Example:

With Parameter:

int i = 0;

button1.Click += delegate(object s, RoutedEventArgs e)

            {

                i++;

                string buttonText = (s as Button).Content.ToString();

                MessageBox.Show(buttonText + " Clicked " + i.ToString() + " time(s)");

            };

Without Parameter:

int i = 0;

            button1.Click += delegate

            {

                i++;

                MessageBox.Show("I am clicked "+i.ToString() +" time(s)");

            };