System.Windows.Forms 1.0.5000.0 2.0.0.0 System.Enum This enumeration is used by the class. Specifies constants defining which buttons to display on a . Field System.Windows.Forms.MessageBoxButtons The message box contains Abort, Retry, and Ignore buttons. 1.0.5000.0 2.0.0.0 Field System.Windows.Forms.MessageBoxButtons The message box contains an OK button. 1.0.5000.0 2.0.0.0 Field System.Windows.Forms.MessageBoxButtons The message box contains OK and Cancel buttons. 1.0.5000.0 2.0.0.0 Field System.Windows.Forms.MessageBoxButtons The message box contains Retry and Cancel buttons. 1.0.5000.0 2.0.0.0 Field System.Windows.Forms.MessageBoxButtons The message box contains Yes and No buttons. 1.0.5000.0 2.0.0.0 Field System.Windows.Forms.MessageBoxButtons The message box contains Yes, No, and Cancel buttons. 1.0.5000.0 2.0.0.0