lambda expression and Messagebox in C#

Question

private void SimpleLambda()
{
  dynamic showMessage =  x => MessageBox.Show(x);

  showMessage("Hello World!");
}

The Error message is : Can't convert lambda expression to dynamic type , because it is not a delegate type

Any help,

Answer 1

private void SimpleLambda()
{
  Action<string> showMessage =  x => MessageBox.Show(x);

  showMessage("Hello World!");
}