Set an operand to MessageBox.Show()?

[MindSystem]

Hi, i want to set an operand to MessageBox.Show("test");

But when i debug, using this code : 

method.Body.Instructions.Insert(0, Instruction.Create(OpCodes.Ldstr, "test"));
                            object a = MessageBox.Show(method.Body.Instructions[0].Operand.ToString());
                            method.Body.Instructions.Insert(1, Instruction.Create(OpCodes.Nop));
                            method.Body.Instructions.OpCode = OpCodes.Call;
                            method.Body.Instructions.Operand = a; 

(Yeah the code is strange haha)

So, when i debug using this code, it shows messagebox unlimited...;

My Question is : how to set an operand to MessageBox.Show without get messagebox?

Thanks you

[XenocodeRCE]

Create a new projet & on button1_click event put a M'essagebox show' then build it up and then decompile it. You will see what's missing from your code

Edited December 22, 2015 by XenocodeRCE

[MindSystem]

2 hours ago, XenocodeRCE said:

Create a new projet & on button1_click event put a M'essagebox show' then build it up and then decompile it. You will see what's missing from your code

Yeah, i forgot the "pop" opcode