Few more reverts for the new approach.

src/Compilers/Core/AnalyzerDriver/AnalyzerDriver.projitems

@@ -10,7 +10,6 @@
   </PropertyGroup>
   <ItemGroup>
     <Compile Include="$(MSBuildThisFileDirectory)AnalyzerExecutor.cs" />
-    <Compile Include="$(MSBuildThisFileDirectory)AnalyzerExceptionDiagnosticArgs.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)AnalyzerManager.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)DeclarationComputer.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)DeclarationInfo.cs" />

src/Compilers/Core/AnalyzerDriver/AnalyzerExceptionDiagnosticArgs.cs

-// Copyright (c) Microsoft.  All Rights Reserved.  Licensed under the Apache License, Version 2.0.  See License.txt in the project root for license information.
-
-using System;
-
-namespace Microsoft.CodeAnalysis.Diagnostics
-{
-    internal class AnalyzerExceptionDiagnosticArgs : EventArgs
-    {
-        public readonly Diagnostic Diagnostic;
-        public readonly DiagnosticAnalyzer FaultedAnalyzer;
-
-        public AnalyzerExceptionDiagnosticArgs(DiagnosticAnalyzer analyzer, Diagnostic diagnostic)
-        {
-            this.FaultedAnalyzer = analyzer;
-            this.Diagnostic = diagnostic;
-        }
-    }
-}

src/Diagnostics/Roslyn/Core/ApiDesign/DeclarePublicAPIAnalyzer.cs

@@ -77,8 +77,7 @@ public class DeclarePublicAPIAnalyzer : DiagnosticAnalyzer
             MethodKind.EventRemove
         };
 
-        public override ImmutableArray<DiagnosticDescriptor> SupportedDiagnostics // ImmutableArray.Create(DeclareNewApiRule, RemoveDeletedApiRule);
-        { get { throw new Exception(); } }
+        public override ImmutableArray<DiagnosticDescriptor> SupportedDiagnostics => ImmutableArray.Create(DeclareNewApiRule, RemoveDeletedApiRule);
 
         public override void Initialize(AnalysisContext context)
         {

src/Features/Core/Diagnostics/WorkspaceAnalyzerExceptionDiagnosticArgs.cs

-// Copyright (c) Microsoft.  All Rights Reserved.  Licensed under the Apache License, Version 2.0.  See License.txt in the project root for license information.
-
-using System;
-
-namespace Microsoft.CodeAnalysis.Diagnostics
-{
-    internal class WorkspaceAnalyzerExceptionDiagnosticArgs : EventArgs
-    {
-        public readonly Diagnostic Diagnostic;
-        public readonly DiagnosticAnalyzer FaultedAnalyzer;
-        public readonly Workspace Workspace;
-        public readonly Project ProjectOpt;
-
-        public WorkspaceAnalyzerExceptionDiagnosticArgs(DiagnosticAnalyzer analyzer, Diagnostic diagnostic, Workspace workspace, Project projectOpt = null)
-        {
-            this.FaultedAnalyzer = analyzer;
-            this.Diagnostic = diagnostic;
-            this.Workspace = workspace;
-            this.ProjectOpt = projectOpt;
-        }
-    }
-}

src/Features/Core/Features.csproj

@@ -177,7 +177,6 @@
     <Compile Include="Completion\Providers\KeywordCompletionItem.cs" />
     <Compile Include="Completion\Providers\RecommendedKeyword.cs" />
     <Compile Include="Diagnostics\AnalyzerDriverResources.cs" />
-    <Compile Include="Diagnostics\WorkspaceAnalyzerExceptionDiagnosticArgs.cs" />
     <Compile Include="Diagnostics\AnalyzerHelper.cs" />
     <Compile Include="Diagnostics\AbstractHostDiagnosticUpdateSource.cs" />
     <Compile Include="Diagnostics\WorkspaceAnalyzerManager.cs" />