how to display a message box if an event was successful in C# code example

Example 1: messagebox.show c# error

MessageBox.Show("Some text", "Some title", 
    MessageBoxButtons.OK, MessageBoxIcon.Error);

Example 2: winforms messagebox with button

string message = "Do you want to close this window?";  
string title = "Close Window";  
MessageBoxButtons buttons = MessageBoxButtons.YesNo;  
DialogResult result = MessageBox.Show(message, title, buttons);  
if (result == DialogResult.Yes) {  
    this.Close();  
} else {  
    // Do something  
}