C# if else exception

I'm trying to make if-else working in IL by System.Reflection and System.Reflection.Emit. This is the code which I currently have: ``` Label inequality = new System.Reflection.Emit.Label(); Label equality = new System.Reflection.Emit.Label(); Label end = new System.Reflection.Emit.Label(); var method = new DynamicMethod("dummy", null, Type.EmptyTypes); var g = method.GetILGenerator(); g.Emit(OpCodes.Ldstr, "string"); g.Emit(OpCodes.Ldstr, "string"); g.Emit(OpCodes.Call, typeof(String).GetMethod("op_Equality", new Type[]{typeof(string), typeof(string)})); g.Emit(OpCodes.Ldc_I4, 0); g.Emit(OpCodes.Ceq); g.Emit(OpCodes.Brtrue_S, inequality); g.MarkLabel(inequality); //HERE it throws exception g.Emit(OpCodes.Ldstr, "Specified strings are different."); g.Emit(OpCodes.Call, typeof(Console).GetMethod("WriteLine", new Type[]{typeof(string)})); g.Emit(OpCodes.Br_S, end); g.Emit(OpCodes.Brfalse_S, equality); g.MarkLabel(equality); g.Emit(OpCodes.Ldstr, "Specified strings are same."); g.Emit(OpCodes.Call, typeof(Console).GetMethod("WriteLine", new Type[] { typeof(string) })); g.Emit(OpCodes.Br_S, end); g.MarkLabel(end); g.Emit(OpCodes.Ret); var action = (Action)method.CreateDelegate(typeof(Action)); action(); Console.Read(); ``` Now, on line where I'm marking label it throws me this exception: Object reference not set to an instance of an object. But I think it's stupidity because that label is associated with new Label object. Does anybody know how can I solve this problem? Thanks.