Simple multi-threading - combining statements to two lines

Question

If I have:

ThreadStart starter = delegate { MessageBox.Show("Test"); };
new Thread(starter).Start();

How can I combine this into one line of code? I've tried:

new Thread(delegate { MessageBox.Show("Test"); }).Start();

But I get this error:

The call is ambiguous between the following methods or properties: 'System.Threading.Thread.Thread(System.Threading.ThreadStart)' and 'System.Threading.Thread.Thread(System.Threading.ParameterizedThreadStart)'

Answer 1

new Thread(() => MessageBox.Show("Test")).Start();

or

new Thread((ThreadStart)delegate { MessageBox.Show("Test"); }).Start();

or

new Thread(delegate() { MessageBox.Show("Test"); }).Start();

The problem is when you declared a delegate without specifying how many parameters it had, the compiler didn't know whether you meant ThreadStart(0 parameters) or ParameterizedThreadStart(1 parameter).