exclude Qbservable generated code

Rx.NET/Source/Directory.build.targets

@@ -6,7 +6,7 @@
   
   <!-- This props all need to be set in targets as they depend on the values set earlier -->
   <PropertyGroup Condition="'$(TargetFramework)' == 'netstandard1.3'">
-    <DefineConstants>$(DefineConstants);NO_EVENTARGS_CONSTRAINT;HAS_WINRT;PREFER_ASYNC;USE_TIMER_SELF_ROOT;HAS_TPL46;NO_REMOTING;NO_SERIALIZABLE;CRIPPLED_REFLECTION</DefineConstants>
+    <DefineConstants>$(DefineConstants);NO_EVENTARGS_CONSTRAINT;NO_CODE_COVERAGE_ATTRIBUTE;HAS_WINRT;PREFER_ASYNC;USE_TIMER_SELF_ROOT;HAS_TPL46;NO_REMOTING;NO_SERIALIZABLE;CRIPPLED_REFLECTION</DefineConstants>
   </PropertyGroup>
   <PropertyGroup Condition="'$(TargetFramework)' == 'net45'">
     <DefineConstants>$(DefineConstants);NO_EVENTARGS_CONSTRAINT;HAS_WINRT;PREFER_ASYNC;USE_TIMER_SELF_ROOT;DESKTOPCLR</DefineConstants>
@@ -15,7 +15,7 @@
     <DefineConstants>$(DefineConstants);NO_EVENTARGS_CONSTRAINT;HAS_WINRT;PREFER_ASYNC;USE_TIMER_SELF_ROOT;HAS_TPL46;DESKTOPCLR</DefineConstants>
   </PropertyGroup>
   <PropertyGroup Condition="'$(TargetFramework)' == 'uap10.0'">
-    <DefineConstants>$(DefineConstants);NO_EVENTARGS_CONSTRAINT;HAS_WINRT;PREFER_ASYNC;USE_TIMER_SELF_ROOT;HAS_TPL46;NO_REMOTING;NO_SERIALIZABLE;CRIPPLED_REFLECTION;NO_THREAD;WINDOWS</DefineConstants>
+    <DefineConstants>$(DefineConstants);NO_EVENTARGS_CONSTRAINT;NO_CODE_COVERAGE_ATTRIBUTE;HAS_WINRT;PREFER_ASYNC;USE_TIMER_SELF_ROOT;HAS_TPL46;NO_REMOTING;NO_SERIALIZABLE;CRIPPLED_REFLECTION;NO_THREAD;WINDOWS</DefineConstants>
   </PropertyGroup>
   <PropertyGroup Condition="'$(TargetFramework)' == 'netcoreapp1.0' or '$(TargetFramework)' == 'netcoreapp1.1'">
     <DefineConstants>$(DefineConstants);NO_EVENTARGS_CONSTRAINT;HAS_WINRT;PREFER_ASYNC;USE_TIMER_SELF_ROOT;HAS_TPL46;NO_REMOTING;NO_SERIALIZABLE;CRIPPLED_REFLECTION</DefineConstants>    

Rx.NET/Source/build-new.ps1

@@ -99,7 +99,7 @@ $testDirectory = Join-Path $scriptPath "tests\Tests.System.Reactive"
 
 # Run .NET Core only for now until perf improves on the runner for .net desktop
 $dotnet = "$env:ProgramFiles\dotnet\dotnet.exe"
-.\packages\JetBrains.dotCover.CommandLineTools\tools\dotCover.exe cover /targetexecutable="$dotnet" /targetworkingdir="$testDirectory" /targetarguments="test -c $configuration --no-build -f netcoreapp1.0 --filter:SkipCI!=true" /output="$outputFileDotCover1" /Filters="+:module=System.Reactive;+:module=Microsoft.Reactive.Testing;+:module=System.Reactive.Observable.Aliases;-:type=Xunit*" /DisableDefaultFilters /ReturnTargetExitCode
+.\packages\JetBrains.dotCover.CommandLineTools\tools\dotCover.exe cover /targetexecutable="$dotnet" /targetworkingdir="$testDirectory" /targetarguments="test -c $configuration --no-build -f netcoreapp1.0 --filter:SkipCI!=true" /output="$outputFileDotCover1" /Filters="+:module=System.Reactive;+:module=Microsoft.Reactive.Testing;+:module=System.Reactive.Observable.Aliases;-:type=Xunit*" /DisableDefaultFilters /ReturnTargetExitCode /AttributeFilters="System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverageAttribute"
 
 if ($LastExitCode -ne 0) { 
 	Write-Host "Error with tests" -Foreground Red
@@ -109,7 +109,7 @@ if ($LastExitCode -ne 0) {
 }
 
 # run .net desktop tests
-.\packages\JetBrains.dotCover.CommandLineTools\tools\dotCover.exe cover /targetexecutable="$xUnitConsolePath" /targetworkingdir="$testDirectory\bin\$configuration\net46\" /targetarguments="Tests.System.Reactive.dll -notrait SkipCI=true" /output="$outputFileDotCover2" /Filters="+:module=System.Reactive;+:module=Microsoft.Reactive.Testing;+:module=System.Reactive.Observable.Aliases;-:type=Xunit*" /DisableDefaultFilters /ReturnTargetExitCode
+.\packages\JetBrains.dotCover.CommandLineTools\tools\dotCover.exe cover /targetexecutable="$xUnitConsolePath" /targetworkingdir="$testDirectory\bin\$configuration\net46\" /targetarguments="Tests.System.Reactive.dll -notrait SkipCI=true" /output="$outputFileDotCover2" /Filters="+:module=System.Reactive;+:module=Microsoft.Reactive.Testing;+:module=System.Reactive.Observable.Aliases;-:type=Xunit*" /DisableDefaultFilters /ReturnTargetExitCode  /AttributeFilters="System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverageAttribute"
 
 if ($LastExitCode -ne 0) { 
 	Write-Host "Error with tests" -Foreground Red

Rx.NET/Source/src/System.Reactive/ExcludeFromCodeCoverageAttribute.cs

@@ -0,0 +1,15 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the Apache 2.0 License.
+// See the LICENSE file in the project root for more information. 
+
+#if NO_CODE_COVERAGE_ATTRIBUTE
+
+namespace System.Diagnostics.CodeAnalysis
+{
+    [AttributeUsage(AttributeTargets.Class | AttributeTargets.Struct | AttributeTargets.Constructor | AttributeTargets.Method | AttributeTargets.Property | AttributeTargets.Event, Inherited = false)]
+    internal sealed class ExcludeFromCodeCoverageAttribute : Attribute
+    {
+    }
+}
+
+#endif

Rx.NET/Source/src/System.Reactive/Linq/Qbservable.Generated.cs

@@ -17,6 +17,7 @@ using System.Reflection;
 using System.Threading;
 using System.Reactive;
 using System.Reactive.Subjects;
+using System.Diagnostics.CodeAnalysis;
 #if !NO_TPL
 using System.Threading.Tasks;
 #endif
@@ -26,6 +27,7 @@ using System.Runtime.Remoting.Lifetime;
 
 namespace System.Reactive.Linq
 {
+    [ExcludeFromCodeCoverage]
     public static partial class Qbservable
     {
         /// <summary>