How can I display a messagebox in ASP.NET?

Question

I want to show a message box on the successful save of any item. I googled it and tried different solutions, but none of them worked. Here is the code I am using:

Answer 1

I use this and it works

public void Messagebox(string xMessage)
{
    Response.Write("");
}

And I call like this

    Messagebox("je suis la!");