Expose Marshall.LoadLibrary API

src/System.Runtime.InteropServices/ref/System.Runtime.InteropServices.csproj

@@ -9,6 +9,7 @@
   </PropertyGroup>
   <ItemGroup>
     <Compile Include="System.Runtime.InteropServices.cs" />
+    <Compile Condition="'$(TargetsNetCoreApp)' == 'true'" Include="System.Runtime.InteropServices.netcoreapp.cs" />
   </ItemGroup>
   <ItemGroup>
     <ProjectReference Include="..\..\System.Reflection\ref\System.Reflection.csproj" />

src/System.Runtime.InteropServices/ref/System.Runtime.InteropServices.netcoreapp.cs

@@ -0,0 +1,20 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+// See the LICENSE file in the project root for more information.
+// ------------------------------------------------------------------------------
+// Changes to this file must follow the http://aka.ms/api-review process.
+// ------------------------------------------------------------------------------
+
+namespace System.Runtime.InteropServices
+{
+    public static partial class Marshal
+    {
+        public static void FreeLibrary(System.IntPtr handle) { }
+        public static System.IntPtr GetLibraryExport(System.IntPtr handle, string name) { throw null; }
+        public static System.IntPtr LoadLibrary(string libraryPath) { throw null; }
+        public static System.IntPtr LoadLibrary(string libraryName, System.Reflection.Assembly assembly, DllImportSearchPath? searchPath) { throw null; }
+        public static bool TryGetLibraryExport(System.IntPtr handle, string name, out System.IntPtr address) { throw null; }
+        public static bool TryLoadLibrary(string libraryPath, out System.IntPtr handle) { throw null; }
+        public static bool TryLoadLibrary(string libraryName, System.Reflection.Assembly assembly, DllImportSearchPath? searchPath, out System.IntPtr handle) { throw null; }
+    }
+}