diff --git a/mcs/class/System.Core/win32_unityaot_System.Core.dll.exclude.sources b/mcs/class/System.Core/win32_unityaot_System.Core.dll.exclude.sources
index 98bbea6ac7a8..f41395e99801 100644
--- a/mcs/class/System.Core/win32_unityaot_System.Core.dll.exclude.sources
+++ b/mcs/class/System.Core/win32_unityaot_System.Core.dll.exclude.sources
@@ -2,3 +2,9 @@
 ../../../external/corefx/src/Common/src/Interop/Unix/System.Native/Interop.GetDomainSocketSizes.cs
 ../../../external/corefx/src/Common/src/Interop/Unix/Interop.Libraries.cs
 ../../../external/corefx/src/System.Linq/src/System/Linq/*.cs
+
+System.IO.Pipes/AnonymousPipeServerStream.NotSupported.cs
+System.IO.Pipes/NamedPipeClientStream.NotSupported.cs
+System.IO.Pipes/NamedPipeServerStream.NotSupported.cs
+System.IO.Pipes/PipeStream.NotSupported.cs
+System.IO.Pipes/SafePipeHandle.NotSupported.cs
diff --git a/mcs/class/System.Core/win32_unityaot_System.Core.dll.sources b/mcs/class/System.Core/win32_unityaot_System.Core.dll.sources
index c17ce3546d26..ecf907a43e44 100644
--- a/mcs/class/System.Core/win32_unityaot_System.Core.dll.sources
+++ b/mcs/class/System.Core/win32_unityaot_System.Core.dll.sources
@@ -3,3 +3,49 @@
 ../../../external/corefx/src/System.Net.Sockets/src/System/Net/Sockets/UnixDomainSocketEndPoint.Windows.cs
 ../referencesource/System.Core/System/Linq/Enumerable.cs
 corefx/SR.cs
+
+System.IO.Pipes/NamedPipeClientStream.Windows.cs
+System.IO.Pipes/NamedPipeServerStream.Windows.cs
+System.IO.Pipes/AnonymousPipeServerStream.Windows.cs
+../../../external/corefx/src/Common/src/Interop/Windows/Interop.Libraries.cs
+../../../external/corefx/src/Common/src/Interop/Windows/kernel32/Interop.CloseHandle.cs
+../../../external/corefx/src/Common/src/Interop/Windows/Interop.Errors.cs
+../../../external/corefx/src/Common/src/Interop/Windows/kernel32/Interop.FormatMessage.cs
+../../../external/corefx/src/Common/src/Interop/Windows/kernel32/Interop.SecurityOptions.cs
+../../../external/corefx/src/Common/src/Interop/Windows/Interop.BOOL.cs
+../../../external/corefx/src/Common/src/Interop/Windows/kernel32/Interop.SECURITY_ATTRIBUTES.cs
+../../../external/corefx/src/Common/src/Interop/Windows/kernel32/Interop.GenericOperations.cs
+../../../external/corefx/src/Common/src/Interop/Windows/kernel32/Interop.HandleOptions.cs
+../../../external/corefx/src/Common/src/Interop/Windows/kernel32/Interop.PipeOptions.cs
+../../../external/corefx/src/Common/src/Interop/Windows/kernel32/Interop.FileOperations.cs
+../../../external/corefx/src/Common/src/Interop/Windows/kernel32/Interop.FileTypes.cs
+../../../external/corefx/src/Common/src/Interop/Windows/kernel32/Interop.GetCurrentProcess_IntPtr.cs
+../../../external/corefx/src/Common/src/Interop/Windows/kernel32/Interop.DuplicateHandle_IntPtr.cs
+../../../external/corefx/src/Common/src/Interop/Windows/kernel32/Interop.GetFileType_SafeHandle.cs
+../../../external/corefx/src/Common/src/Interop/Windows/kernel32/Interop.CreatePipe_SafePipeHandle.cs
+../../../external/corefx/src/Common/src/Interop/Windows/kernel32/Interop.ConnectNamedPipe.cs
+../../../external/corefx/src/Common/src/Interop/Windows/kernel32/Interop.WaitNamedPipe.cs
+../../../external/corefx/src/Common/src/Interop/Windows/kernel32/Interop.GetNamedPipeHandleState.cs
+../../../external/corefx/src/Common/src/Interop/Windows/kernel32/Interop.GetNamedPipeInfo.cs
+../../../external/corefx/src/Common/src/Interop/Windows/kernel32/Interop.CreateNamedPipeClient.cs
+../../../external/corefx/src/Common/src/Interop/Windows/kernel32/Interop.SetNamedPipeHandleState.cs
+../../../external/corefx/src/Common/src/Interop/Windows/kernel32/Interop.CancelIoEx.cs
+../../../external/corefx/src/Common/src/Interop/Windows/kernel32/Interop.FlushFileBuffers.cs
+../../../external/corefx/src/Common/src/Interop/Windows/kernel32/Interop.ReadFile_SafeHandle_IntPtr.cs
+../../../external/corefx/src/Common/src/Interop/Windows/kernel32/Interop.ReadFile_SafeHandle_NativeOverlapped.cs
+../../../external/corefx/src/Common/src/Interop/Windows/kernel32/Interop.WriteFile_SafeHandle_IntPtr.cs
+../../../external/corefx/src/Common/src/Interop/Windows/kernel32/Interop.WriteFile_SafeHandle_NativeOverlapped.cs
+../../../external/corefx/src/Common/src/Interop/Windows/kernel32/Interop.DisconnectNamedPipe.cs
+../../../external/corefx/src/Common/src/Interop/Windows/kernel32/Interop.CreateNamedPipe.cs
+../../../external/corefx/src/Common/src/Interop/Windows/kernel32/Interop.MaxLengths.cs
+../../../external/corefx/src/Common/src/Interop/Windows/advapi32/Interop.RevertToSelf.cs
+../../../external/corefx/src/Common/src/Interop/Windows/advapi32/Interop.ImpersonateNamedPipeClient.cs
+
+../../../external/corefx/src/System.IO.Pipes/src/Microsoft/Win32/SafeHandles/SafePipeHandle.Windows.cs
+../../../external/corefx/src/System.IO.Pipes/src/System/IO/Pipes/AnonymousPipeServerStream.Windows.cs
+../../../external/corefx/src/System.IO.Pipes/src/System/IO/Pipes/ConnectionCompletionSource.cs
+../../../external/corefx/src/System.IO.Pipes/src/System/IO/Pipes/NamedPipeClientStream.Windows.cs
+../../../external/corefx/src/System.IO.Pipes/src/System/IO/Pipes/NamedPipeServerStream.Windows.cs
+../../../external/corefx/src/System.IO.Pipes/src/System/IO/Pipes/PipeCompletionSource.cs
+../../../external/corefx/src/System.IO.Pipes/src/System/IO/Pipes/PipeStream.Windows.cs
+../../../external/corefx/src/System.IO.Pipes/src/System/IO/Pipes/ReadWriteCompletionSource.cs