Fixed all warnings in the C# code.

Author: ddobrev

src/Core/Toolchains/MSVCToolchain.cs

@@ -209,7 +209,6 @@ public static List<string> GetSystemIncludes(VisualStudioVersion vsVersion)
         private static IEnumerable<string> GetIncludeDirsFromWindowsSdks(
             int windowsSdkMajorVer, List<ToolchainVersion> windowsSdks)
         {
-            var includes = new List<string>();
             var majorWindowsSdk = windowsSdks.Find(
                 version => (int) Math.Floor(version.Version) == windowsSdkMajorVer);
             var windowsSdkDirs = majorWindowsSdk.Directory != null ?

src/Generator.Tests/AST/TestAST.cs

@@ -412,7 +412,6 @@ public void TestOriginalNamesOfSpecializations()
         [Test]
         public void TestPrintingConstPointerWithConstType()
         {
-            var template = AstContext.FindDecl<ClassTemplate>("TestSpecializationArguments").First();
             var cppTypePrinter = new CppTypePrinter { PrintScopeKind = CppTypePrintScopeKind.Qualified };
             var builtin = new BuiltinType(PrimitiveType.Char);
             var pointee = new QualifiedType(builtin, new TypeQualifiers { IsConst = true });

src/Generator/Generator.cs

@@ -88,7 +88,6 @@ private void GenerateTemplates(List<GeneratorOutput> outputs, IEnumerable<Transl
         {
             foreach (var unit in units)
             {
-                var includeDir = Path.GetDirectoryName(unit.FilePath);
                 var templates = Generate(new[] { unit });
                 if (templates.Count == 0)
                     return;

src/Generator/Generators/CSharp/CSharpSources.cs

@@ -1526,7 +1526,6 @@ private void AllocateNewVTables(Class @class, IList<VTableComponent> wrappedEntr
 
         private void SaveOriginalVTablePointers(Class @class, bool cast = false)
         {
-            var suffix = Helpers.GetSuffixForInternal(@class);
             var pointer = cast ? $@"(({Helpers.InternalStruct}{
                 Helpers.GetSuffixForInternal(@class)}*) native)" : "native";
             if (Context.ParserOptions.IsMicrosoftAbi)

src/Generator/Passes/IgnoreSystemDeclarationsPass.cs

@@ -55,7 +55,6 @@ public override bool VisitClassDecl(Class @class)
                     {
                         foreach (var method in specialization.Methods.Where(m => m.OriginalName != "c_str"))
                             method.ExplicitlyIgnore();
-                        var l = specialization.Methods.Where(m => m.IsConstructor && m.Parameters.Count == 2).ToList();
                         var ctor = specialization.Methods.Single(m => m.IsConstructor && m.Parameters.Count == 2 &&
                             m.Parameters[0].Type.Desugar().IsPointerToPrimitiveType(PrimitiveType.Char) &&
                             !m.Parameters[1].Type.Desugar().IsPrimitiveType());