Show Method (String, String, MessageBoxButtons, MessageBoxIcon, MessageBoxDefaultButton, MessageBoxOptions)
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MessageBox.Show Method (String, String, MessageBoxButtons, MessageBoxIcon, MessageBoxDefaultButton, MessageBoxOptions)


Displays a message box with the specified text, caption, buttons, icon, default button, and options.

Namespace:   System.Windows.Forms
Assembly:  System.Windows.Forms (in System.Windows.Forms.dll)

public static DialogResult Show(
	string text,
	string caption,
	MessageBoxButtons buttons,
	MessageBoxIcon icon,
	MessageBoxDefaultButton defaultButton,
	MessageBoxOptions options


Type: System.String

The text to display in the message box.

Type: System.String

The text to display in the title bar of the message box.

Type: System.Windows.Forms.MessageBoxButtons

One of the MessageBoxButtons values that specifies which buttons to display in the message box.

Type: System.Windows.Forms.MessageBoxIcon

One of the MessageBoxIcon values that specifies which icon to display in the message box.

Type: System.Windows.Forms.MessageBoxDefaultButton

One of the MessageBoxDefaultButton values that specifies the default button for the message box.

Type: System.Windows.Forms.MessageBoxOptions

One of the MessageBoxOptions values that specifies which display and association options will be used for the message box. You may pass in 0 if you wish to use the defaults.

Return Value

Type: System.Windows.Forms.DialogResult

One of the DialogResult values.

Exception Condition

buttons is not a member of MessageBoxButtons.


icon is not a member of MessageBoxIcon.


The defaultButton specified is not a member of MessageBoxDefaultButton.


An attempt was made to display the MessageBox in a process that is not running in User Interactive mode. This is specified by the SystemInformation.UserInteractive property.


options specified both DefaultDesktopOnly and ServiceNotification.


buttons specified an invalid combination of MessageBoxButtons.

You can have a maximum of three buttons on the message box.

The following code example demonstrates how to display a MessageBox with the options supported by this overload of Show. After verifying that a string variable, ServerName, is empty, the example displays a MessageBox with a question box icon, offering the user the option to cancel the operation. The example uses the RightAlign member of the MessageBoxOptions enumeration to align the text to the right edge of the dialog box. If the Show method's return value evaluates to Yes, the form that displayed the MessageBox is closed.

private void validateUserEntry2()

	// Checks the value of the text.

	if(serverName.Text.Length == 0)

		// Initializes the variables to pass to the MessageBox.Show method.

		string message = "You did not enter a server name. Cancel this operation?";
		string caption = "No Server Name Specified";
		MessageBoxButtons buttons = MessageBoxButtons.YesNo;
		DialogResult result;

		// Displays the MessageBox.

		result = MessageBox.Show(this, message, caption, buttons,
			MessageBoxIcon.Question, MessageBoxDefaultButton.Button1, 

		if(result == DialogResult.Yes)

			// Closes the parent form.






for safe subwindows to call this method. Associated enumeration: UIPermissionWindow.SafeSubWindows

.NET Framework
Available since 1.1
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