Display Please waite message

Question

 i want to display please wait  message  while running  in c#.Iam tried to display the message, but it not display.

 I put the code
 label.text="Please wait....";
it display after the program running. Iwant to disply this message between the running
Code sample below
 label.text="Please wait....";
string bakup = "BACKUP DATABASE " + myCurDbName + " TO DISK='C:\\temp\\" + myCurDbName + ".bak" + "'";
myDbTask.ExecuteNonQuery(bakup);


Application is Windows based, not web