Add Roslyn version 3.5.0-beta3-20111-03 binaries from the (#25)

.. nuget `Microsoft.Net.Compilers.Toolset`.

Version taken from msbuild/xplat-master(and mono-2019-10) branch,
(https://github.com/mono/msbuild/blob/xplat-master/eng/Versions.props#L27)
inserted by Maestro++ .

- Skipped from the nuget:
    - [Content_Types].xml
    - catalog.json
    - extension.vsixmanifest
    - manifest.json
    - Roslyn.Compilers.Extension.* (windows/VS specific)
    - skipped package/* directory

- Edited `csi.rsp` with (matches what we used for 3.4.0):

```
-/r:System
-/r:System.Core
-/r:Microsoft.CSharp
+/r:System.dll
+/r:System.Core.dll
+/r:Microsoft.CSharp.dll
+/r:Facades/System.Runtime.dll
+/r:Facades/netstandard.dll
/u:System
/u:System.IO
/u:System.Collections.Generic
```

20 files changed, 41 insertions, 13 deletions

diff --git a/Microsoft.Net.Compilers/3.5.0/Microsoft.Build.Tasks.CodeAnalysis.dll b/Microsoft.Net.Compilers/3.5.0/Microsoft.Build.Tasks.CodeAnalysis.dll
index 14c4ba0..28b6b33 100644
--- a/Microsoft.Net.Compilers/3.5.0/Microsoft.Build.Tasks.CodeAnalysis.dll
+++ b/Microsoft.Net.Compilers/3.5.0/Microsoft.Build.Tasks.CodeAnalysis.dll
diff --git a/Microsoft.Net.Compilers/3.5.0/Microsoft.CSharp.Core.targets b/Microsoft.Net.Compilers/3.5.0/Microsoft.CSharp.Core.targets
index ed91b90..7db6883 100644
--- a/Microsoft.Net.Compilers/3.5.0/Microsoft.CSharp.Core.targets
+++ b/Microsoft.Net.Compilers/3.5.0/Microsoft.CSharp.Core.targets
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
-<!-- Copyright (c)  Microsoft.  All Rights Reserved.  Licensed under the Apache License, Version 2.0.  See License.txt in the project root for license information. -->
+<!-- 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. -->
 <Project ToolsVersion="14.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
   <Import Project="Microsoft.Managed.Core.targets"/>
 
diff --git a/Microsoft.Net.Compilers/3.5.0/Microsoft.CodeAnalysis.CSharp.Scripting.dll b/Microsoft.Net.Compilers/3.5.0/Microsoft.CodeAnalysis.CSharp.Scripting.dll
index 452298d..7789a5d 100644
--- a/Microsoft.Net.Compilers/3.5.0/Microsoft.CodeAnalysis.CSharp.Scripting.dll
+++ b/Microsoft.Net.Compilers/3.5.0/Microsoft.CodeAnalysis.CSharp.Scripting.dll
diff --git a/Microsoft.Net.Compilers/3.5.0/Microsoft.CodeAnalysis.CSharp.dll b/Microsoft.Net.Compilers/3.5.0/Microsoft.CodeAnalysis.CSharp.dll
index d981a20..51bb8de 100644
--- a/Microsoft.Net.Compilers/3.5.0/Microsoft.CodeAnalysis.CSharp.dll
+++ b/Microsoft.Net.Compilers/3.5.0/Microsoft.CodeAnalysis.CSharp.dll
diff --git a/Microsoft.Net.Compilers/3.5.0/Microsoft.CodeAnalysis.Scripting.dll b/Microsoft.Net.Compilers/3.5.0/Microsoft.CodeAnalysis.Scripting.dll
index 28a3e4d..ef549d5 100644
--- a/Microsoft.Net.Compilers/3.5.0/Microsoft.CodeAnalysis.Scripting.dll
+++ b/Microsoft.Net.Compilers/3.5.0/Microsoft.CodeAnalysis.Scripting.dll
diff --git a/Microsoft.Net.Compilers/3.5.0/Microsoft.CodeAnalysis.VisualBasic.dll b/Microsoft.Net.Compilers/3.5.0/Microsoft.CodeAnalysis.VisualBasic.dll
index d2f4cf7..aa3b3e6 100644
--- a/Microsoft.Net.Compilers/3.5.0/Microsoft.CodeAnalysis.VisualBasic.dll
+++ b/Microsoft.Net.Compilers/3.5.0/Microsoft.CodeAnalysis.VisualBasic.dll
diff --git a/Microsoft.Net.Compilers/3.5.0/Microsoft.CodeAnalysis.dll b/Microsoft.Net.Compilers/3.5.0/Microsoft.CodeAnalysis.dll
index 6f35dca..15ded97 100644
--- a/Microsoft.Net.Compilers/3.5.0/Microsoft.CodeAnalysis.dll
+++ b/Microsoft.Net.Compilers/3.5.0/Microsoft.CodeAnalysis.dll
diff --git a/Microsoft.Net.Compilers/3.5.0/Microsoft.Managed.Core.targets b/Microsoft.Net.Compilers/3.5.0/Microsoft.Managed.Core.targets
index c87a659..a6c9a14 100644
--- a/Microsoft.Net.Compilers/3.5.0/Microsoft.Managed.Core.targets
+++ b/Microsoft.Net.Compilers/3.5.0/Microsoft.Managed.Core.targets
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
-<!-- Copyright (c)  Microsoft.  All Rights Reserved.  Licensed under the Apache License, Version 2.0.  See License.txt in the project root for license information. -->
+<!-- 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. -->
 <Project ToolsVersion="14.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
   <!--
     Common targets for managed compilers.
diff --git a/Microsoft.Net.Compilers/3.5.0/Microsoft.VisualBasic.Core.targets b/Microsoft.Net.Compilers/3.5.0/Microsoft.VisualBasic.Core.targets
index d9e5eaa..e69d6c8 100644
--- a/Microsoft.Net.Compilers/3.5.0/Microsoft.VisualBasic.Core.targets
+++ b/Microsoft.Net.Compilers/3.5.0/Microsoft.VisualBasic.Core.targets
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
-<!-- Copyright (c)  Microsoft.  All Rights Reserved.  Licensed under the Apache License, Version 2.0.  See License.txt in the project root for license information. -->
+<!-- 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. -->
 <Project ToolsVersion="14.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
   <Import Project="Microsoft.Managed.Core.targets"/>
 
diff --git a/Microsoft.Net.Compilers/3.5.0/System.Runtime.CompilerServices.Unsafe.dll b/Microsoft.Net.Compilers/3.5.0/System.Runtime.CompilerServices.Unsafe.dll
index 3156239..0c27a0e 100644
--- a/Microsoft.Net.Compilers/3.5.0/System.Runtime.CompilerServices.Unsafe.dll
+++ b/Microsoft.Net.Compilers/3.5.0/System.Runtime.CompilerServices.Unsafe.dll
diff --git a/Microsoft.Net.Compilers/3.5.0/VBCSCompiler.exe b/Microsoft.Net.Compilers/3.5.0/VBCSCompiler.exe
index d0c3890..f52deae 100644
--- a/Microsoft.Net.Compilers/3.5.0/VBCSCompiler.exe
+++ b/Microsoft.Net.Compilers/3.5.0/VBCSCompiler.exe
diff --git a/Microsoft.Net.Compilers/3.5.0/VBCSCompiler.exe.config b/Microsoft.Net.Compilers/3.5.0/VBCSCompiler.exe.config
index 0715c12..47ae91f 100644
--- a/Microsoft.Net.Compilers/3.5.0/VBCSCompiler.exe.config
+++ b/Microsoft.Net.Compilers/3.5.0/VBCSCompiler.exe.config
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
-<!-- Copyright (c)  Microsoft.  All Rights Reserved.  Licensed under the Apache License, Version 2.0.  See License.txt in the project root for license information. -->
+<!-- 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. -->
 <configuration>
   <startup>
     <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.7.2" />
@@ -10,6 +10,12 @@
     <gcConcurrent enabled="false" />
     <assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">
       <dependentAssembly>
+        <assemblyIdentity name="System.Runtime.CompilerServices.Unsafe" publicKeyToken="b03f5f7f11d50a3a" culture="neutral" />
+        <bindingRedirect oldVersion="0.0.0.0-4.0.5.0" newVersion="4.0.5.0" />
+      </dependentAssembly>
+    </assemblyBinding>
+    <assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">
+      <dependentAssembly>
         <assemblyIdentity name="Microsoft.CodeAnalysis.CSharp" publicKeyToken="31bf3856ad364e35" culture="neutral" />
         <bindingRedirect oldVersion="0.0.0.0-3.5.0.0" newVersion="3.5.0.0" />
       </dependentAssembly>
@@ -59,7 +65,7 @@
     <assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">
       <dependentAssembly>
         <assemblyIdentity name="System.Runtime.CompilerServices.Unsafe" publicKeyToken="b03f5f7f11d50a3a" culture="neutral" />
-        <bindingRedirect oldVersion="0.0.0.0-4.0.4.1" newVersion="4.0.4.1" />
+        <bindingRedirect oldVersion="0.0.0.0-4.0.5.0" newVersion="4.0.5.0" />
       </dependentAssembly>
     </assemblyBinding>
     <assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">
diff --git a/Microsoft.Net.Compilers/3.5.0/csc.exe b/Microsoft.Net.Compilers/3.5.0/csc.exe
index 346a320..6d5557b 100644
--- a/Microsoft.Net.Compilers/3.5.0/csc.exe
+++ b/Microsoft.Net.Compilers/3.5.0/csc.exe
diff --git a/Microsoft.Net.Compilers/3.5.0/csc.exe.config b/Microsoft.Net.Compilers/3.5.0/csc.exe.config
index 910bda5..c7d3dee 100644
--- a/Microsoft.Net.Compilers/3.5.0/csc.exe.config
+++ b/Microsoft.Net.Compilers/3.5.0/csc.exe.config
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
-<!-- Copyright (c)  Microsoft.  All Rights Reserved.  Licensed under the Apache License, Version 2.0.  See License.txt in the project root for license information. -->
+<!-- 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. -->
 <configuration>
   <startup>
     <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.7.2" />
@@ -10,6 +10,12 @@
     <gcConcurrent enabled="false" />
     <assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">
       <dependentAssembly>
+        <assemblyIdentity name="System.Runtime.CompilerServices.Unsafe" publicKeyToken="b03f5f7f11d50a3a" culture="neutral" />
+        <bindingRedirect oldVersion="0.0.0.0-4.0.5.0" newVersion="4.0.5.0" />
+      </dependentAssembly>
+    </assemblyBinding>
+    <assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">
+      <dependentAssembly>
         <assemblyIdentity name="Microsoft.CodeAnalysis.CSharp" publicKeyToken="31bf3856ad364e35" culture="neutral" />
         <bindingRedirect oldVersion="0.0.0.0-3.5.0.0" newVersion="3.5.0.0" />
       </dependentAssembly>
@@ -53,7 +59,7 @@
     <assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">
       <dependentAssembly>
         <assemblyIdentity name="System.Runtime.CompilerServices.Unsafe" publicKeyToken="b03f5f7f11d50a3a" culture="neutral" />
-        <bindingRedirect oldVersion="0.0.0.0-4.0.4.1" newVersion="4.0.4.1" />
+        <bindingRedirect oldVersion="0.0.0.0-4.0.5.0" newVersion="4.0.5.0" />
       </dependentAssembly>
     </assemblyBinding>
     <assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">
diff --git a/Microsoft.Net.Compilers/3.5.0/csc.rsp b/Microsoft.Net.Compilers/3.5.0/csc.rsp
index ce72ac6..7b1e629 100644
--- a/Microsoft.Net.Compilers/3.5.0/csc.rsp
+++ b/Microsoft.Net.Compilers/3.5.0/csc.rsp
@@ -1,4 +1,6 @@
-# Copyright (c)  Microsoft.  All Rights Reserved.  Licensed under the Apache License, Version 2.0.  See License.txt in the project root for license information.
+# 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.
 
 # This file contains command-line options that the C#
 # command line compiler (CSC) will process as part
diff --git a/Microsoft.Net.Compilers/3.5.0/csi.exe b/Microsoft.Net.Compilers/3.5.0/csi.exe
index 6c9a8cc..5b60800 100644
--- a/Microsoft.Net.Compilers/3.5.0/csi.exe
+++ b/Microsoft.Net.Compilers/3.5.0/csi.exe
diff --git a/Microsoft.Net.Compilers/3.5.0/csi.exe.config b/Microsoft.Net.Compilers/3.5.0/csi.exe.config
index 5340b67..e994c0b 100644
--- a/Microsoft.Net.Compilers/3.5.0/csi.exe.config
+++ b/Microsoft.Net.Compilers/3.5.0/csi.exe.config
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
-<!-- Copyright (c)  Microsoft.  All Rights Reserved.  Licensed under the Apache License, Version 2.0.  See License.txt in the project root for license information. -->
+<!-- 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. -->
 <configuration>
   <startup>
     <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.7.2" />
@@ -8,6 +8,12 @@
     <AppContextSwitchOverrides value="Switch.System.Security.Cryptography.UseLegacyFipsThrow=false" />
     <assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">
       <dependentAssembly>
+        <assemblyIdentity name="System.Runtime.CompilerServices.Unsafe" publicKeyToken="b03f5f7f11d50a3a" culture="neutral" />
+        <bindingRedirect oldVersion="0.0.0.0-4.0.5.0" newVersion="4.0.5.0" />
+      </dependentAssembly>
+    </assemblyBinding>
+    <assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">
+      <dependentAssembly>
         <assemblyIdentity name="Microsoft.CodeAnalysis.CSharp" publicKeyToken="31bf3856ad364e35" culture="neutral" />
         <bindingRedirect oldVersion="0.0.0.0-3.5.0.0" newVersion="3.5.0.0" />
       </dependentAssembly>
@@ -63,7 +69,7 @@
     <assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">
       <dependentAssembly>
         <assemblyIdentity name="System.Runtime.CompilerServices.Unsafe" publicKeyToken="b03f5f7f11d50a3a" culture="neutral" />
-        <bindingRedirect oldVersion="0.0.0.0-4.0.4.1" newVersion="4.0.4.1" />
+        <bindingRedirect oldVersion="0.0.0.0-4.0.5.0" newVersion="4.0.5.0" />
       </dependentAssembly>
     </assemblyBinding>
     <assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">
diff --git a/Microsoft.Net.Compilers/3.5.0/vbc.exe b/Microsoft.Net.Compilers/3.5.0/vbc.exe
index 2f326a8..5dfc14a 100644
--- a/Microsoft.Net.Compilers/3.5.0/vbc.exe
+++ b/Microsoft.Net.Compilers/3.5.0/vbc.exe
diff --git a/Microsoft.Net.Compilers/3.5.0/vbc.exe.config b/Microsoft.Net.Compilers/3.5.0/vbc.exe.config
index 78ae050..17bd665 100644
--- a/Microsoft.Net.Compilers/3.5.0/vbc.exe.config
+++ b/Microsoft.Net.Compilers/3.5.0/vbc.exe.config
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
-<!-- Copyright (c)  Microsoft.  All Rights Reserved.  Licensed under the Apache License, Version 2.0.  See License.txt in the project root for license information. -->
+<!-- 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. -->
 <configuration>
   <startup>
     <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.7.2" />
@@ -10,6 +10,12 @@
     <gcConcurrent enabled="false" />
     <assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">
       <dependentAssembly>
+        <assemblyIdentity name="System.Runtime.CompilerServices.Unsafe" publicKeyToken="b03f5f7f11d50a3a" culture="neutral" />
+        <bindingRedirect oldVersion="0.0.0.0-4.0.5.0" newVersion="4.0.5.0" />
+      </dependentAssembly>
+    </assemblyBinding>
+    <assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">
+      <dependentAssembly>
         <assemblyIdentity name="Microsoft.CodeAnalysis" publicKeyToken="31bf3856ad364e35" culture="neutral" />
         <bindingRedirect oldVersion="0.0.0.0-3.5.0.0" newVersion="3.5.0.0" />
       </dependentAssembly>
@@ -53,7 +59,7 @@
     <assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">
       <dependentAssembly>
         <assemblyIdentity name="System.Runtime.CompilerServices.Unsafe" publicKeyToken="b03f5f7f11d50a3a" culture="neutral" />
-        <bindingRedirect oldVersion="0.0.0.0-4.0.4.1" newVersion="4.0.4.1" />
+        <bindingRedirect oldVersion="0.0.0.0-4.0.5.0" newVersion="4.0.5.0" />
       </dependentAssembly>
     </assemblyBinding>
     <assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">
diff --git a/Microsoft.Net.Compilers/3.5.0/vbc.rsp b/Microsoft.Net.Compilers/3.5.0/vbc.rsp
index 473404d..794335a 100644
--- a/Microsoft.Net.Compilers/3.5.0/vbc.rsp
+++ b/Microsoft.Net.Compilers/3.5.0/vbc.rsp
@@ -1,4 +1,6 @@
-# Copyright (c)  Microsoft.  All Rights Reserved.  Licensed under the Apache License, Version 2.0.  See License.txt in the project root for license information.
+# 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.
 
 # This file contains command-line options that the VB
 # command line compiler (VBC) will process as part