Move to a newer version of CoreCLR

Microsoft.NETCore.App 3.0.0-preview6-27706-07, SDK version 3.0.100-preview6-011773

docs/contributing/Building, Debugging, and Testing on Windows.md

@@ -19,7 +19,7 @@ The minimal required version of .NET Framework is 4.7.2.
     - Ensure C#, VB, MSBuild, .NET Core and Visual Studio Extensibility are included in the selected work loads
     - Ensure Visual Studio is on Version "RC1" or greater
     - Ensure "Use Previews" is checked in Tools -> Options -> Projects and Solutions -> .NET Core
-1. [.NET Core SDK 3.0 Preview 4](https://dotnet.microsoft.com/download/dotnet-core/3.0) [Windows x64 installer](https://dotnetcli.azureedge.net/dotnet/Sdk/3.0.100-preview4-010963/dotnet-sdk-3.0.100-preview4-010963-win-x64.exe )
+1. [.NET Core SDK 3.0 Preview 6](https://dotnet.microsoft.com/download/dotnet-core/3.0) [Windows x64 installer](https://dotnetcli.azureedge.net/dotnet/Sdk/3.0.100-preview6-011773/dotnet-sdk-3.0.100-preview6-011773-win-x64.exe )
 1. [PowerShell 5.0 or newer](https://docs.microsoft.com/en-us/powershell/scripting/setup/installing-windows-powershell). If you are on Windows 10, you are fine; you'll only need to upgrade if you're on Windows 7. The download link is under the "upgrading existing Windows PowerShell" heading.
 1. Run Restore.cmd
 1. Open Roslyn.sln

eng/Versions.props

@@ -67,9 +67,8 @@
     <MicrosoftMSXMLVersion>8.0.0.0-alpha</MicrosoftMSXMLVersion>
     <MicrosoftNetCompilersToolsetVersion>3.1.0-beta1-19164-01</MicrosoftNetCompilersToolsetVersion>
     <MicrosoftNetCoreAnalyzersVersion>$(RoslynDiagnosticsNugetPackageVersion)</MicrosoftNetCoreAnalyzersVersion>
-    <MicrosoftNetCoreILAsmVersion>3.0.0-preview4-27525-72</MicrosoftNetCoreILAsmVersion>
-    <MicrosoftNetCoreILAsmVersion>3.0.0-preview4-27525-72</MicrosoftNetCoreILAsmVersion>
-    <MicrosoftNetCoreILDasmVersion>3.0.0-preview4-27525-72</MicrosoftNetCoreILDasmVersion>
+    <MicrosoftNetCoreILAsmVersion>3.0.0-preview6-27706-71</MicrosoftNetCoreILAsmVersion>
+    <MicrosoftNetCoreILDasmVersion>3.0.0-preview6-27706-71</MicrosoftNetCoreILDasmVersion>
     <MicrosoftNETCorePlatformsVersion>2.1.2</MicrosoftNETCorePlatformsVersion>
     <MicrosoftNETTestSdkVersion>16.0.1</MicrosoftNETTestSdkVersion>
     <MicrosoftNETCoreTestHostVersion>1.1.0</MicrosoftNETCoreTestHostVersion>

global.json

 {
   "tools": {
-    "dotnet": "3.0.100-preview4-010963",
+    "dotnet": "3.0.100-preview6-011773",
     "vs": {
       "version": "16.0"
     },

src/Compilers/CSharp/Test/Symbol/Microsoft.CodeAnalysis.CSharp.Symbol.UnitTests.csproj

@@ -6,7 +6,6 @@
     <RootNamespace>Microsoft.CodeAnalysis.CSharp.Symbol.UnitTests</RootNamespace>
     <NoStdLib>true</NoStdLib>
     <TargetFrameworks>net472;netcoreapp3.0</TargetFrameworks>
-    <RuntimeIdentifiers>$(RoslynPortableRuntimeIdentifiers)</RuntimeIdentifiers>
     <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
   </PropertyGroup>
   <ItemGroup Label="Project References">