Provide correct Microsoft.VisualBasic assemblies for each version of .NET

Author: siegfriedpammer

ICSharpCode.Decompiler.Tests/Helpers/Tester.cs

@@ -524,16 +524,21 @@ public static async Task<CompilerResults> CompileCSharp(string sourceFileName, C
 					libPath = "\"" + refAsmPath + "\"";
 					references = references.Select(r => "-r:\"" + Path.Combine(refAsmPath, r) + "\"");
 					sourceFileNames.Add(targetFrameworkAttributeSnippetFiles[targetFramework].Value);
+					if (flags.HasFlag(CompilerOptions.ReferenceVisualBasic))
+					{
+						references = references.Concat(new[] { "-r:\"" + Path.Combine(refAsmPath, "Microsoft.VisualBasic.dll") + "\"" });
+						references = references.Concat(new[] { "-r:\"" + Path.Combine(refAsmPath, "Microsoft.VisualBasic.Core.dll") + "\"" });
+					}
 				}
 				else
 				{
 					refAsmPath = RefAssembliesToolset.GetPath("legacy");
 					libPath = "\"" + refAsmPath + "\"";
 					references = defaultReferences.Select(r => "-r:\"" + Path.Combine(refAsmPath, r) + "\"");
-				}
-				if (flags.HasFlag(CompilerOptions.ReferenceVisualBasic))
-				{
-					references = references.Concat(new[] { "-r:\"" + Path.Combine(refAsmPath, "Microsoft.VisualBasic.dll") + "\"" });
+					if (flags.HasFlag(CompilerOptions.ReferenceVisualBasic))
+					{
+						references = references.Concat(new[] { "-r:\"" + Path.Combine(refAsmPath, "Microsoft.VisualBasic.dll") + "\"" });
+					}
 				}
 				if (useRoslyn && !targetNet40 && flags.HasFlag(CompilerOptions.ReferenceUnsafe))
 				{