diff --git a/src/libraries/System.Net.WebClient/src/System/Net/WebClient.cs b/src/libraries/System.Net.WebClient/src/System/Net/WebClient.cs
index 27289121acd006..553bf48943d5a7 100644
--- a/src/libraries/System.Net.WebClient/src/System/Net/WebClient.cs
+++ b/src/libraries/System.Net.WebClient/src/System/Net/WebClient.cs
@@ -143,7 +143,7 @@ public Encoding Encoding
             get { return _encoding; }
             set
             {
-                ThrowIfNull(value, nameof(value));
+                ArgumentNullException.ThrowIfNull(value, nameof(value));
                 _encoding = value;
             }
         }
@@ -280,7 +280,7 @@ public byte[] DownloadData(string address) =>
 
         public byte[] DownloadData(Uri address)
         {
-            ThrowIfNull(address, nameof(address));
+            ArgumentNullException.ThrowIfNull(address, nameof(address));
 
             StartOperation();
             try
@@ -320,8 +320,8 @@ public void DownloadFile(string address, string fileName) =>
 
         public void DownloadFile(Uri address, string fileName)
         {
-            ThrowIfNull(address, nameof(address));
-            ThrowIfNull(fileName, nameof(fileName));
+            ArgumentNullException.ThrowIfNull(address, nameof(address));
+            ArgumentNullException.ThrowIfNull(fileName, nameof(fileName));
 
             WebRequest? request = null;
             FileStream? fs = null;
@@ -359,7 +359,7 @@ public Stream OpenRead(string address) =>
 
         public Stream OpenRead(Uri address)
         {
-            ThrowIfNull(address, nameof(address));
+            ArgumentNullException.ThrowIfNull(address, nameof(address));
 
             WebRequest? request = null;
             StartOperation();
@@ -392,7 +392,7 @@ public Stream OpenWrite(string address, string? method) =>
 
         public Stream OpenWrite(Uri address, string? method)
         {
-            ThrowIfNull(address, nameof(address));
+            ArgumentNullException.ThrowIfNull(address, nameof(address));
             if (method == null)
             {
                 method = MapToDefaultMethod(address);
@@ -432,8 +432,8 @@ public byte[] UploadData(string address, string? method, byte[] data) =>
 
         public byte[] UploadData(Uri address, string? method, byte[] data)
         {
-            ThrowIfNull(address, nameof(address));
-            ThrowIfNull(data, nameof(data));
+            ArgumentNullException.ThrowIfNull(address, nameof(address));
+            ArgumentNullException.ThrowIfNull(data, nameof(data));
             if (method == null)
             {
                 method = MapToDefaultMethod(address);
@@ -553,8 +553,8 @@ public byte[] UploadFile(string address, string? method, string fileName) =>
 
         public byte[] UploadFile(Uri address, string? method, string fileName)
         {
-            ThrowIfNull(address, nameof(address));
-            ThrowIfNull(fileName, nameof(fileName));
+            ArgumentNullException.ThrowIfNull(address, nameof(address));
+            ArgumentNullException.ThrowIfNull(fileName, nameof(fileName));
             if (method == null)
             {
                 method = MapToDefaultMethod(address);
@@ -626,8 +626,8 @@ public byte[] UploadValues(string address, string? method, NameValueCollection d
 
         public byte[] UploadValues(Uri address, string? method, NameValueCollection data)
         {
-            ThrowIfNull(address, nameof(address));
-            ThrowIfNull(data, nameof(data));
+            ArgumentNullException.ThrowIfNull(address, nameof(address));
+            ArgumentNullException.ThrowIfNull(data, nameof(data));
             if (method == null)
             {
                 method = MapToDefaultMethod(address);
@@ -665,8 +665,8 @@ public string UploadString(string address, string? method, string data) =>
 
         public string UploadString(Uri address, string? method, string data)
         {
-            ThrowIfNull(address, nameof(address));
-            ThrowIfNull(data, nameof(data));
+            ArgumentNullException.ThrowIfNull(address, nameof(address));
+            ArgumentNullException.ThrowIfNull(data, nameof(data));
             if (method == null)
             {
                 method = MapToDefaultMethod(address);
@@ -691,7 +691,7 @@ public string DownloadString(string address) =>
 
         public string DownloadString(Uri address)
         {
-            ThrowIfNull(address, nameof(address));
+            ArgumentNullException.ThrowIfNull(address, nameof(address));
 
             StartOperation();
             try
@@ -781,7 +781,7 @@ private void CopyHeadersTo(WebRequest request)
 
         private Uri GetUri(string address)
         {
-            ThrowIfNull(address, nameof(address));
+            ArgumentNullException.ThrowIfNull(address, nameof(address));
 
             Uri? uri;
             if (_baseAddress != null)
@@ -801,7 +801,7 @@ private Uri GetUri(string address)
 
         private Uri GetUri(Uri address)
         {
-            ThrowIfNull(address, nameof(address));
+            ArgumentNullException.ThrowIfNull(address, nameof(address));
 
             Uri? uri = address;
 
@@ -1297,7 +1297,7 @@ public void OpenReadAsync(Uri address) =>
 
         public void OpenReadAsync(Uri address, object? userToken)
         {
-            ThrowIfNull(address, nameof(address));
+            ArgumentNullException.ThrowIfNull(address, nameof(address));
 
             AsyncOperation asyncOp = StartAsyncOperation(userToken);
             try
@@ -1335,7 +1335,7 @@ public void OpenWriteAsync(Uri address, string? method) =>
 
         public void OpenWriteAsync(Uri address, string? method, object? userToken)
         {
-            ThrowIfNull(address, nameof(address));
+            ArgumentNullException.ThrowIfNull(address, nameof(address));
             if (method == null)
             {
                 method = MapToDefaultMethod(address);
@@ -1396,7 +1396,7 @@ public void DownloadStringAsync(Uri address) =>
 
         public void DownloadStringAsync(Uri address, object? userToken)
         {
-            ThrowIfNull(address, nameof(address));
+            ArgumentNullException.ThrowIfNull(address, nameof(address));
 
             AsyncOperation asyncOp = StartAsyncOperation(userToken);
             try
@@ -1422,7 +1422,7 @@ public void DownloadDataAsync(Uri address) =>
 
         public void DownloadDataAsync(Uri address, object? userToken)
         {
-            ThrowIfNull(address, nameof(address));
+            ArgumentNullException.ThrowIfNull(address, nameof(address));
 
             AsyncOperation asyncOp = StartAsyncOperation(userToken);
             try
@@ -1448,8 +1448,8 @@ public void DownloadFileAsync(Uri address, string fileName) =>
 
         public void DownloadFileAsync(Uri address, string fileName, object? userToken)
         {
-            ThrowIfNull(address, nameof(address));
-            ThrowIfNull(fileName, nameof(fileName));
+            ArgumentNullException.ThrowIfNull(address, nameof(address));
+            ArgumentNullException.ThrowIfNull(fileName, nameof(fileName));
 
             FileStream? fs = null;
             AsyncOperation asyncOp = StartAsyncOperation(userToken);
@@ -1474,8 +1474,8 @@ public void UploadStringAsync(Uri address, string? method, string data) =>
 
         public void UploadStringAsync(Uri address, string? method, string data, object? userToken)
         {
-            ThrowIfNull(address, nameof(address));
-            ThrowIfNull(data, nameof(data));
+            ArgumentNullException.ThrowIfNull(address, nameof(address));
+            ArgumentNullException.ThrowIfNull(data, nameof(data));
             if (method == null)
             {
                 method = MapToDefaultMethod(address);
@@ -1525,8 +1525,8 @@ public void UploadDataAsync(Uri address, string? method, byte[] data) =>
 
         public void UploadDataAsync(Uri address, string? method, byte[] data, object? userToken)
         {
-            ThrowIfNull(address, nameof(address));
-            ThrowIfNull(data, nameof(data));
+            ArgumentNullException.ThrowIfNull(address, nameof(address));
+            ArgumentNullException.ThrowIfNull(data, nameof(data));
             if (method == null)
             {
                 method = MapToDefaultMethod(address);
@@ -1566,8 +1566,8 @@ public void UploadFileAsync(Uri address, string? method, string fileName) =>
 
         public void UploadFileAsync(Uri address, string? method, string fileName, object? userToken)
         {
-            ThrowIfNull(address, nameof(address));
-            ThrowIfNull(fileName, nameof(fileName));
+            ArgumentNullException.ThrowIfNull(address, nameof(address));
+            ArgumentNullException.ThrowIfNull(fileName, nameof(fileName));
             if (method == null)
             {
                 method = MapToDefaultMethod(address);
@@ -1605,8 +1605,8 @@ public void UploadValuesAsync(Uri address, string? method, NameValueCollection d
 
         public void UploadValuesAsync(Uri address, string? method, NameValueCollection data, object? userToken)
         {
-            ThrowIfNull(address, nameof(address));
-            ThrowIfNull(data, nameof(data));
+            ArgumentNullException.ThrowIfNull(address, nameof(address));
+            ArgumentNullException.ThrowIfNull(data, nameof(data));
             if (method == null)
             {
                 method = MapToDefaultMethod(address);
@@ -1940,14 +1940,6 @@ private void PostProgressChanged(AsyncOperation asyncOp, ProgressData progress)
             }
         }
 
-        private static void ThrowIfNull(object argument, string parameterName)
-        {
-            if (argument == null)
-            {
-                throw new ArgumentNullException(parameterName);
-            }
-        }
-
         #region Supporting Types
         private sealed class ProgressData
         {
diff --git a/src/libraries/System.Private.CoreLib/src/System/ArgumentNullException.cs b/src/libraries/System.Private.CoreLib/src/System/ArgumentNullException.cs
index 0f8a1923ad5033..5f8894e291473e 100644
--- a/src/libraries/System.Private.CoreLib/src/System/ArgumentNullException.cs
+++ b/src/libraries/System.Private.CoreLib/src/System/ArgumentNullException.cs
@@ -10,6 +10,8 @@
 **
 =============================================================================*/
 
+using System.Diagnostics.CodeAnalysis;
+using System.Runtime.CompilerServices;
 using System.Runtime.Serialization;
 
 namespace System
@@ -50,5 +52,20 @@ public ArgumentNullException(string? paramName, string? message)
         protected ArgumentNullException(SerializationInfo info, StreamingContext context) : base(info, context)
         {
         }
+
+        /// <summary>Throws an <see cref="ArgumentNullException"/> if <paramref name="argument"/> is null.</summary>
+        /// <param name="argument">The reference type argument to validate as non-null.</param>
+        /// <param name="paramName">The name of the parameter with which <paramref name="argument"/> corresponds.</param>
+        public static void ThrowIfNull([NotNull] object? argument, [CallerArgumentExpression("argument")] string? paramName = null)
+        {
+            if (argument is null)
+            {
+                Throw(paramName);
+            }
+        }
+
+        [DoesNotReturn]
+        private static void Throw(string? paramName) =>
+            throw new ArgumentNullException(paramName);
     }
 }
diff --git a/src/libraries/System.Reflection.TypeExtensions/src/System.Reflection.TypeExtensions.csproj b/src/libraries/System.Reflection.TypeExtensions/src/System.Reflection.TypeExtensions.csproj
index 3e598d9015c00a..e078dd282ebe7b 100644
--- a/src/libraries/System.Reflection.TypeExtensions/src/System.Reflection.TypeExtensions.csproj
+++ b/src/libraries/System.Reflection.TypeExtensions/src/System.Reflection.TypeExtensions.csproj
@@ -5,10 +5,9 @@
     <TargetFrameworks>$(NetCoreAppCurrent)</TargetFrameworks>
   </PropertyGroup>
   <ItemGroup>
-    <Compile Include="System\Reflection\Requires.cs" />
     <Compile Include="System\Reflection\TypeExtensions.cs" />
   </ItemGroup>
   <ItemGroup>
     <ProjectReference Include="$(CoreLibProject)" />
   </ItemGroup>
-</Project>
\ No newline at end of file
+</Project>
diff --git a/src/libraries/System.Reflection.TypeExtensions/src/System/Reflection/Requires.cs b/src/libraries/System.Reflection.TypeExtensions/src/System/Reflection/Requires.cs
deleted file mode 100644
index 8fa51255d4fe0f..00000000000000
--- a/src/libraries/System.Reflection.TypeExtensions/src/System/Reflection/Requires.cs
+++ /dev/null
@@ -1,16 +0,0 @@
-// Licensed to the .NET Foundation under one or more agreements.
-// The .NET Foundation licenses this file to you under the MIT license.
-
-namespace System.Reflection
-{
-    internal static class Requires
-    {
-        internal static void NotNull(object obj, string name)
-        {
-            if (obj == null)
-            {
-                throw new ArgumentNullException(name);
-            }
-        }
-    }
-}
diff --git a/src/libraries/System.Reflection.TypeExtensions/src/System/Reflection/TypeExtensions.cs b/src/libraries/System.Reflection.TypeExtensions/src/System/Reflection/TypeExtensions.cs
index 3e3b6ca2961c39..6c020bbfffd4ba 100644
--- a/src/libraries/System.Reflection.TypeExtensions/src/System/Reflection/TypeExtensions.cs
+++ b/src/libraries/System.Reflection.TypeExtensions/src/System/Reflection/TypeExtensions.cs
@@ -11,14 +11,14 @@ public static class TypeExtensions
             [DynamicallyAccessedMembers(DynamicallyAccessedMemberTypes.PublicConstructors)] this Type type,
             Type[] types)
         {
-            Requires.NotNull(type, nameof(type));
+            ArgumentNullException.ThrowIfNull(type, nameof(type));
             return type.GetConstructor(types);
         }
 
         public static ConstructorInfo[] GetConstructors(
             [DynamicallyAccessedMembers(DynamicallyAccessedMemberTypes.PublicConstructors)] this Type type)
         {
-            Requires.NotNull(type, nameof(type));
+            ArgumentNullException.ThrowIfNull(type, nameof(type));
             return type.GetConstructors();
         }
 
@@ -26,7 +26,7 @@ public static ConstructorInfo[] GetConstructors(
             [DynamicallyAccessedMembers(DynamicallyAccessedMemberTypes.PublicConstructors | DynamicallyAccessedMemberTypes.NonPublicConstructors)] this Type type,
             BindingFlags bindingAttr)
         {
-            Requires.NotNull(type, nameof(type));
+            ArgumentNullException.ThrowIfNull(type, nameof(type));
             return type.GetConstructors(bindingAttr);
         }
 
@@ -39,7 +39,7 @@ public static MemberInfo[] GetDefaultMembers(
                 | DynamicallyAccessedMemberTypes.PublicConstructors
                 | DynamicallyAccessedMemberTypes.PublicNestedTypes)] this Type type)
         {
-            Requires.NotNull(type, nameof(type));
+            ArgumentNullException.ThrowIfNull(type, nameof(type));
             return type.GetDefaultMembers();
         }
 
@@ -47,7 +47,7 @@ public static MemberInfo[] GetDefaultMembers(
             [DynamicallyAccessedMembers(DynamicallyAccessedMemberTypes.PublicEvents)] this Type type,
             string name)
         {
-            Requires.NotNull(type, nameof(type));
+            ArgumentNullException.ThrowIfNull(type, nameof(type));
             return type.GetEvent(name);
         }
 
@@ -56,14 +56,14 @@ public static MemberInfo[] GetDefaultMembers(
             string name,
             BindingFlags bindingAttr)
         {
-            Requires.NotNull(type, nameof(type));
+            ArgumentNullException.ThrowIfNull(type, nameof(type));
             return type.GetEvent(name, bindingAttr);
         }
 
         public static EventInfo[] GetEvents(
             [DynamicallyAccessedMembers(DynamicallyAccessedMemberTypes.PublicEvents)] this Type type)
         {
-            Requires.NotNull(type, nameof(type));
+            ArgumentNullException.ThrowIfNull(type, nameof(type));
             return type.GetEvents();
         }
 
@@ -71,7 +71,7 @@ public static EventInfo[] GetEvents(
             [DynamicallyAccessedMembers(DynamicallyAccessedMemberTypes.PublicEvents | DynamicallyAccessedMemberTypes.NonPublicEvents)] this Type type,
             BindingFlags bindingAttr)
         {
-            Requires.NotNull(type, nameof(type));
+            ArgumentNullException.ThrowIfNull(type, nameof(type));
             return type.GetEvents(bindingAttr);
         }
 
@@ -79,7 +79,7 @@ public static EventInfo[] GetEvents(
             [DynamicallyAccessedMembers(DynamicallyAccessedMemberTypes.PublicFields)] this Type type,
             string name)
         {
-            Requires.NotNull(type, nameof(type));
+            ArgumentNullException.ThrowIfNull(type, nameof(type));
             return type.GetField(name);
         }
 
@@ -88,14 +88,14 @@ public static EventInfo[] GetEvents(
             string name,
             BindingFlags bindingAttr)
         {
-            Requires.NotNull(type, nameof(type));
+            ArgumentNullException.ThrowIfNull(type, nameof(type));
             return type.GetField(name, bindingAttr);
         }
 
         public static FieldInfo[] GetFields(
             [DynamicallyAccessedMembers(DynamicallyAccessedMemberTypes.PublicFields)] this Type type)
         {
-            Requires.NotNull(type, nameof(type));
+            ArgumentNullException.ThrowIfNull(type, nameof(type));
             return type.GetFields();
         }
 
@@ -103,20 +103,20 @@ public static FieldInfo[] GetFields(
             [DynamicallyAccessedMembers(DynamicallyAccessedMemberTypes.PublicFields | DynamicallyAccessedMemberTypes.NonPublicFields)] this Type type,
             BindingFlags bindingAttr)
         {
-            Requires.NotNull(type, nameof(type));
+            ArgumentNullException.ThrowIfNull(type, nameof(type));
             return type.GetFields(bindingAttr);
         }
 
         public static Type[] GetGenericArguments(this Type type)
         {
-            Requires.NotNull(type, nameof(type));
+            ArgumentNullException.ThrowIfNull(type, nameof(type));
             return type.GetGenericArguments();
         }
 
         public static Type[] GetInterfaces(
             [DynamicallyAccessedMembers(DynamicallyAccessedMemberTypes.Interfaces)] this Type type)
         {
-            Requires.NotNull(type, nameof(type));
+            ArgumentNullException.ThrowIfNull(type, nameof(type));
             return type.GetInterfaces();
         }
 
@@ -130,7 +130,7 @@ public static MemberInfo[] GetMember(
                 | DynamicallyAccessedMemberTypes.PublicNestedTypes)] this Type type,
             string name)
         {
-            Requires.NotNull(type, nameof(type));
+            ArgumentNullException.ThrowIfNull(type, nameof(type));
             return type.GetMember(name);
         }
 
@@ -139,7 +139,7 @@ public static MemberInfo[] GetMember(
             string name,
             BindingFlags bindingAttr)
         {
-            Requires.NotNull(type, nameof(type));
+            ArgumentNullException.ThrowIfNull(type, nameof(type));
             return type.GetMember(name, bindingAttr);
         }
 
@@ -152,7 +152,7 @@ public static MemberInfo[] GetMembers(
                 | DynamicallyAccessedMemberTypes.PublicConstructors
                 | DynamicallyAccessedMemberTypes.PublicNestedTypes)] this Type type)
         {
-            Requires.NotNull(type, nameof(type));
+            ArgumentNullException.ThrowIfNull(type, nameof(type));
             return type.GetMembers();
         }
 
@@ -160,7 +160,7 @@ public static MemberInfo[] GetMembers(
             [DynamicallyAccessedMembers(DynamicallyAccessedMemberTypes.All)] this Type type,
             BindingFlags bindingAttr)
         {
-            Requires.NotNull(type, nameof(type));
+            ArgumentNullException.ThrowIfNull(type, nameof(type));
             return type.GetMembers(bindingAttr);
         }
 
@@ -168,7 +168,7 @@ public static MemberInfo[] GetMembers(
             [DynamicallyAccessedMembers(DynamicallyAccessedMemberTypes.PublicMethods)] this Type type,
             string name)
         {
-            Requires.NotNull(type, nameof(type));
+            ArgumentNullException.ThrowIfNull(type, nameof(type));
             return type.GetMethod(name);
         }
 
@@ -177,7 +177,7 @@ public static MemberInfo[] GetMembers(
             string name,
             BindingFlags bindingAttr)
         {
-            Requires.NotNull(type, nameof(type));
+            ArgumentNullException.ThrowIfNull(type, nameof(type));
             return type.GetMethod(name, bindingAttr);
         }
 
@@ -186,14 +186,14 @@ public static MemberInfo[] GetMembers(
             string name,
             Type[] types)
         {
-            Requires.NotNull(type, nameof(type));
+            ArgumentNullException.ThrowIfNull(type, nameof(type));
             return type.GetMethod(name, types);
         }
 
         public static MethodInfo[] GetMethods(
             [DynamicallyAccessedMembers(DynamicallyAccessedMemberTypes.PublicMethods)] this Type type)
         {
-            Requires.NotNull(type, nameof(type));
+            ArgumentNullException.ThrowIfNull(type, nameof(type));
             return type.GetMethods();
         }
 
@@ -201,7 +201,7 @@ public static MethodInfo[] GetMethods(
             [DynamicallyAccessedMembers(DynamicallyAccessedMemberTypes.PublicMethods | DynamicallyAccessedMemberTypes.NonPublicMethods)] this Type type,
             BindingFlags bindingAttr)
         {
-            Requires.NotNull(type, nameof(type));
+            ArgumentNullException.ThrowIfNull(type, nameof(type));
             return type.GetMethods(bindingAttr);
         }
 
@@ -210,7 +210,7 @@ public static MethodInfo[] GetMethods(
             string name,
             BindingFlags bindingAttr)
         {
-            Requires.NotNull(type, nameof(type));
+            ArgumentNullException.ThrowIfNull(type, nameof(type));
             return type.GetNestedType(name, bindingAttr);
         }
 
@@ -218,14 +218,14 @@ public static Type[] GetNestedTypes(
             [DynamicallyAccessedMembers(DynamicallyAccessedMemberTypes.PublicNestedTypes | DynamicallyAccessedMemberTypes.NonPublicNestedTypes)] this Type type,
             BindingFlags bindingAttr)
         {
-            Requires.NotNull(type, nameof(type));
+            ArgumentNullException.ThrowIfNull(type, nameof(type));
             return type.GetNestedTypes(bindingAttr);
         }
 
         public static PropertyInfo[] GetProperties(
             [DynamicallyAccessedMembers(DynamicallyAccessedMemberTypes.PublicProperties)] this Type type)
         {
-            Requires.NotNull(type, nameof(type));
+            ArgumentNullException.ThrowIfNull(type, nameof(type));
             return type.GetProperties();
         }
 
@@ -233,7 +233,7 @@ public static PropertyInfo[] GetProperties(
             [DynamicallyAccessedMembers(DynamicallyAccessedMemberTypes.PublicProperties | DynamicallyAccessedMemberTypes.NonPublicProperties)] this Type type,
             BindingFlags bindingAttr)
         {
-            Requires.NotNull(type, nameof(type));
+            ArgumentNullException.ThrowIfNull(type, nameof(type));
             return type.GetProperties(bindingAttr);
         }
 
@@ -241,7 +241,7 @@ public static PropertyInfo[] GetProperties(
             [DynamicallyAccessedMembers(DynamicallyAccessedMemberTypes.PublicProperties)] this Type type,
             string name)
         {
-            Requires.NotNull(type, nameof(type));
+            ArgumentNullException.ThrowIfNull(type, nameof(type));
             return type.GetProperty(name);
         }
 
@@ -250,7 +250,7 @@ public static PropertyInfo[] GetProperties(
             string name,
             BindingFlags bindingAttr)
         {
-            Requires.NotNull(type, nameof(type));
+            ArgumentNullException.ThrowIfNull(type, nameof(type));
             return type.GetProperty(name, bindingAttr);
         }
 
@@ -259,7 +259,7 @@ public static PropertyInfo[] GetProperties(
             string name,
             Type? returnType)
         {
-            Requires.NotNull(type, nameof(type));
+            ArgumentNullException.ThrowIfNull(type, nameof(type));
             return type.GetProperty(name, returnType);
         }
 
@@ -269,19 +269,19 @@ public static PropertyInfo[] GetProperties(
             Type? returnType,
             Type[] types)
         {
-            Requires.NotNull(type, nameof(type));
+            ArgumentNullException.ThrowIfNull(type, nameof(type));
             return type.GetProperty(name, returnType, types);
         }
 
         public static bool IsAssignableFrom(this Type type, [System.Diagnostics.CodeAnalysis.NotNullWhen(true)] Type? c)
         {
-            Requires.NotNull(type, nameof(type));
+            ArgumentNullException.ThrowIfNull(type, nameof(type));
             return type.IsAssignableFrom(c);
         }
 
         public static bool IsInstanceOfType(this Type type, [System.Diagnostics.CodeAnalysis.NotNullWhen(true)] object? o)
         {
-            Requires.NotNull(type, nameof(type));
+            ArgumentNullException.ThrowIfNull(type, nameof(type));
             return type.IsInstanceOfType(o);
         }
     }
@@ -291,20 +291,20 @@ public static class AssemblyExtensions
         [RequiresUnreferencedCode("Types might be removed")]
         public static Type[] GetExportedTypes(this Assembly assembly)
         {
-            Requires.NotNull(assembly, nameof(assembly));
+            ArgumentNullException.ThrowIfNull(assembly, nameof(assembly));
             return assembly.GetExportedTypes();
         }
 
         public static Module[] GetModules(this Assembly assembly)
         {
-            Requires.NotNull(assembly, nameof(assembly));
+            ArgumentNullException.ThrowIfNull(assembly, nameof(assembly));
             return assembly.GetModules();
         }
 
         [RequiresUnreferencedCode("Types might be removed")]
         public static Type[] GetTypes(this Assembly assembly)
         {
-            Requires.NotNull(assembly, nameof(assembly));
+            ArgumentNullException.ThrowIfNull(assembly, nameof(assembly));
             return assembly.GetTypes();
         }
     }
@@ -313,37 +313,37 @@ public static class EventInfoExtensions
     {
         public static MethodInfo? GetAddMethod(this EventInfo eventInfo)
         {
-            Requires.NotNull(eventInfo, nameof(eventInfo));
+            ArgumentNullException.ThrowIfNull(eventInfo, nameof(eventInfo));
             return eventInfo.GetAddMethod();
         }
 
         public static MethodInfo? GetAddMethod(this EventInfo eventInfo, bool nonPublic)
         {
-            Requires.NotNull(eventInfo, nameof(eventInfo));
+            ArgumentNullException.ThrowIfNull(eventInfo, nameof(eventInfo));
             return eventInfo.GetAddMethod(nonPublic);
         }
 
         public static MethodInfo? GetRaiseMethod(this EventInfo eventInfo)
         {
-            Requires.NotNull(eventInfo, nameof(eventInfo));
+            ArgumentNullException.ThrowIfNull(eventInfo, nameof(eventInfo));
             return eventInfo.GetRaiseMethod();
         }
 
         public static MethodInfo? GetRaiseMethod(this EventInfo eventInfo, bool nonPublic)
         {
-            Requires.NotNull(eventInfo, nameof(eventInfo));
+            ArgumentNullException.ThrowIfNull(eventInfo, nameof(eventInfo));
             return eventInfo.GetRaiseMethod(nonPublic);
         }
 
         public static MethodInfo? GetRemoveMethod(this EventInfo eventInfo)
         {
-            Requires.NotNull(eventInfo, nameof(eventInfo));
+            ArgumentNullException.ThrowIfNull(eventInfo, nameof(eventInfo));
             return eventInfo.GetRemoveMethod();
         }
 
         public static MethodInfo? GetRemoveMethod(this EventInfo eventInfo, bool nonPublic)
         {
-            Requires.NotNull(eventInfo, nameof(eventInfo));
+            ArgumentNullException.ThrowIfNull(eventInfo, nameof(eventInfo));
             return eventInfo.GetRemoveMethod(nonPublic);
         }
     }
@@ -358,7 +358,7 @@ public static class MemberInfoExtensions
         /// <remarks>This maybe</remarks>
         public static bool HasMetadataToken(this MemberInfo member)
         {
-            Requires.NotNull(member, nameof(member));
+            ArgumentNullException.ThrowIfNull(member, nameof(member));
 
             try
             {
@@ -380,7 +380,7 @@ public static bool HasMetadataToken(this MemberInfo member)
         /// </exception>
         public static int GetMetadataToken(this MemberInfo member)
         {
-            Requires.NotNull(member, nameof(member));
+            ArgumentNullException.ThrowIfNull(member, nameof(member));
 
             int token = GetMetadataTokenOrZeroOrThrow(member);
 
@@ -413,7 +413,7 @@ public static class MethodInfoExtensions
     {
         public static MethodInfo GetBaseDefinition(this MethodInfo method)
         {
-            Requires.NotNull(method, nameof(method));
+            ArgumentNullException.ThrowIfNull(method, nameof(method));
             return method.GetBaseDefinition();
         }
     }
@@ -422,13 +422,13 @@ public static class ModuleExtensions
     {
         public static bool HasModuleVersionId(this Module module)
         {
-            Requires.NotNull(module, nameof(module));
+            ArgumentNullException.ThrowIfNull(module, nameof(module));
             return true; // not expected to fail on platforms with Module.ModuleVersionId built-in.
         }
 
         public static Guid GetModuleVersionId(this Module module)
         {
-            Requires.NotNull(module, nameof(module));
+            ArgumentNullException.ThrowIfNull(module, nameof(module));
             return module.ModuleVersionId;
         }
     }
@@ -437,37 +437,37 @@ public static class PropertyInfoExtensions
     {
         public static MethodInfo[] GetAccessors(this PropertyInfo property)
         {
-            Requires.NotNull(property, nameof(property));
+            ArgumentNullException.ThrowIfNull(property, nameof(property));
             return property.GetAccessors();
         }
 
         public static MethodInfo[] GetAccessors(this PropertyInfo property, bool nonPublic)
         {
-            Requires.NotNull(property, nameof(property));
+            ArgumentNullException.ThrowIfNull(property, nameof(property));
             return property.GetAccessors(nonPublic);
         }
 
         public static MethodInfo? GetGetMethod(this PropertyInfo property)
         {
-            Requires.NotNull(property, nameof(property));
+            ArgumentNullException.ThrowIfNull(property, nameof(property));
             return property.GetGetMethod();
         }
 
         public static MethodInfo? GetGetMethod(this PropertyInfo property, bool nonPublic)
         {
-            Requires.NotNull(property, nameof(property));
+            ArgumentNullException.ThrowIfNull(property, nameof(property));
             return property.GetGetMethod(nonPublic);
         }
 
         public static MethodInfo? GetSetMethod(this PropertyInfo property)
         {
-            Requires.NotNull(property, nameof(property));
+            ArgumentNullException.ThrowIfNull(property, nameof(property));
             return property.GetSetMethod();
         }
 
         public static MethodInfo? GetSetMethod(this PropertyInfo property, bool nonPublic)
         {
-            Requires.NotNull(property, nameof(property));
+            ArgumentNullException.ThrowIfNull(property, nameof(property));
             return property.GetSetMethod(nonPublic);
         }
     }
diff --git a/src/libraries/System.Runtime/ref/System.Runtime.cs b/src/libraries/System.Runtime/ref/System.Runtime.cs
index 35fe09cc662952..76bbc5dd649585 100644
--- a/src/libraries/System.Runtime/ref/System.Runtime.cs
+++ b/src/libraries/System.Runtime/ref/System.Runtime.cs
@@ -284,6 +284,7 @@ protected ArgumentNullException(System.Runtime.Serialization.SerializationInfo i
         public ArgumentNullException(string? paramName) { }
         public ArgumentNullException(string? message, System.Exception? innerException) { }
         public ArgumentNullException(string? paramName, string? message) { }
+        public static void ThrowIfNull([System.Diagnostics.CodeAnalysis.NotNullAttribute] object? argument, [System.Runtime.CompilerServices.CallerArgumentExpressionAttribute("argument")] string? paramName = null) { throw null; }
     }
     public partial class ArgumentOutOfRangeException : System.ArgumentException
     {
diff --git a/src/libraries/System.Runtime/tests/System/ArgumentNullExceptionTests.cs b/src/libraries/System.Runtime/tests/System/ArgumentNullExceptionTests.cs
index 577e7c4ba26edf..78384466f7fb10 100644
--- a/src/libraries/System.Runtime/tests/System/ArgumentNullExceptionTests.cs
+++ b/src/libraries/System.Runtime/tests/System/ArgumentNullExceptionTests.cs
@@ -47,5 +47,32 @@ public static void Ctor_String_String()
             Assert.Contains(message, exception.Message);
             Assert.Contains(argumentName, exception.Message);
         }
+
+        [Fact]
+        public static void ThrowIfNull_NonNull_DoesntThrow()
+        {
+            foreach (object o in new[] { new object(), "", "argument" })
+            {
+                ArgumentNullException.ThrowIfNull(o);
+                ArgumentNullException.ThrowIfNull(o, "paramName");
+            }
+        }
+
+        [Theory]
+        [InlineData(null)]
+        [InlineData("")]
+        [InlineData("name")]
+        public static void ThrowIfNull_Null_ThrowsArgumentNullException(string paramName)
+        {
+            AssertExtensions.Throws<ArgumentNullException>(paramName, () => ArgumentNullException.ThrowIfNull(null, paramName));
+        }
+
+        [Fact]
+        [ActiveIssue("https://github.com/dotnet/csharplang/issues/287")]
+        public static void ThrowIfNull_UsesArgumentExpression()
+        {
+            object something = null;
+            AssertExtensions.Throws<ArgumentNullException>(nameof(something), () => ArgumentNullException.ThrowIfNull(something));
+        }
     }
 }