This enumeration lists the various button combinations you can request in the MessageBox.Show() method.

public enum MessageBoxButtons {
   OK = 0,
   OKCancel = 1,
   AbortRetryIgnore = 2,
   YesNoCancel = 3,
   YesNo = 4,
   RetryCancel = 5
}

Hierarchy

System.Object System.ValueType System.Enum(System.IComparabl, System.IFormattable, System.IConvertible) MessageBoxButtons

Passed To

System.Windows.Forms.Design.IUIService.ShowMessage(), MessageBox.Show()