Question

I am dynamically creating a GroupBox and trying to assign the MouseLeftButtonDown event to it to perform some action when the user left-clicks on it. This is what I’ve tried:

public MyClass()
{
    tagGroupBox.MouseLeftButtonDown += new MouseButtonEventHandler(tagGroupBox_MouseLeftButtonDown);  //generates error: "tagGroupBox_MouseLeftButtonDown does not exist in the current context"
}

private void tagGroupBox__MouseLeftButtonDown(object sender, MouseButtonEventArgs e)
{
     MessageBox.Show("Left click event triggered");
}

Answer 1

There are __ (double underscores) in handler method.

void tagGroupBox_MouseLeftButtonDown(object sender, MouseButtonEventArgs e)
{
}