Use correct preprocessor symbols for applicable .NET versions

Author: siegfriedpammer

ICSharpCode.Decompiler.Tests/Helpers/Tester.cs

@@ -416,9 +416,6 @@ public static List<string> GetPreprocessorSymbols(CompilerOptions flags)
 				if (!flags.HasFlag(CompilerOptions.TargetNet40))
 				{
 					preprocessorSymbols.Add("NETCORE");
-					preprocessorSymbols.Add("NET60");
-					preprocessorSymbols.Add("NET70");
-					preprocessorSymbols.Add("NET80");
 				}
 				preprocessorSymbols.Add("ROSLYN");
 				preprocessorSymbols.Add("CS60");
@@ -438,13 +435,25 @@ public static List<string> GetPreprocessorSymbols(CompilerOptions flags)
 				if (flags.HasFlag(CompilerOptions.UseRoslyn3_11_0)
 					|| flags.HasFlag(CompilerOptions.UseRoslynLatest))
 				{
+					if (!flags.HasFlag(CompilerOptions.TargetNet40))
+					{
+						preprocessorSymbols.Add("NET50");
+					}
 					preprocessorSymbols.Add("ROSLYN3");
 					preprocessorSymbols.Add("CS80");
 					preprocessorSymbols.Add("CS90");
 					preprocessorSymbols.Add("VB16");
 				}
 				if (flags.HasFlag(CompilerOptions.UseRoslynLatest))
 				{
+					if (!flags.HasFlag(CompilerOptions.TargetNet40))
+					{
+						preprocessorSymbols.Add("NET60");
+						preprocessorSymbols.Add("NET70");
+						preprocessorSymbols.Add("NET80");
+						preprocessorSymbols.Add("NET90");
+						preprocessorSymbols.Add("NET100");
+					}
 					preprocessorSymbols.Add("ROSLYN4");
 					preprocessorSymbols.Add("CS100");
 					preprocessorSymbols.Add("CS110");