Messages

Getting started
To show messages in C#, you need to include this line at the top of the source file using System.Windows.Forms;

MessageBox.Show
A simple message box would be like this: MessageBox.Show("Hello world!");

The simple syntax of MessageBox.Show is as shows (only text is required)

DialogResult MessageBox.Show( string text, string title, MessageBoxButtons buttons, MessageBoxIcon icon )

Examples
Yes or No? DialogResult msgResult; msgResult = MessageBox.Show("Yes or No?", "Yes/No", MessageBoxButtons.YesNo, MessageBoxIcon.Question); if (msgResult == DialogResult.Yes) {  MessageBox.Show("You chose yes"); } else {  MessageBox.Show("You chose no"); }

string. The message show in the box.
How to add message box in vb.net

title
string. The caption of the window.

buttons
MessageBoxButtons. The buttons of the box.

icon
MessageBoxIcon. The icon show on the side. (eg. Exclamation, Critical stop)