when i close or click on close button need to close the operation C#

Question

hi

 

 

when i close or click on close button(into symbol) need to close that, nothing operation need be done in C# Windows application. how to do can anybody help

 

i wrorte simple messagebox

MessageBox.Show("XCoordinate is exceeds, so adjusted to ", +_displayobj.xCoordinate + ".");

when i click close symbol need to be close.

 

thanku