pop up dialog question

I need to create a static text pop up warning me开发者_C百科ssage to the user. I'm coming from the Java Swing world, and I know I can do that in one or two lines of code. Is there an equivalent easy method to call to pop up a warning dialog?? I'd rather not get into creating xaml code etc, just for a simple dialog. Thank you very much!!!

Call MessageBox.Show.