Update assembly flags generation algorithm

src/Main/Base/Project/Src/Gui/Dialogs/OptionPanels/ProjectOptions/AssemblyInfo/AssemblyInfoProvider.cs

@@ -332,10 +332,19 @@ namespace ICSharpCode.SharpDevelop.Gui.OptionPanels
 					flagNames.Add(flagValue.ToString());
 			}
 
-			var codeParser = new CSharpParser();
+			Expression expression = null;
+
+			while (flagNames.Count > 0)
+			{
+				var currentFlagName = flagNames[0];
+				var flagExpression = new MemberReferenceExpression(new IdentifierExpression("AssemblyNameFlags"), currentFlagName);
 
-			var expression = codeParser.ParseExpression(
+				expression = expression == null
-				string.Join(" | ", flagNames.Select(x => string.Format("AssemblyNameFlags.{0}", x))));
+					? (Expression) flagExpression
+					: new BinaryOperatorExpression(expression, BinaryOperatorType.BitwiseOr, flagExpression);
+
+				flagNames.Remove(currentFlagName);
+			}
 
 			return expression;
 		}