ThreadStart Delegate

This represents the method that should be executed on a thread
This delegate is passed to the Thread constructor
This method is not called until the Thread.Start method is called

System.Threading.ThreadStart myThreadStart; 
myThreadStart = new System.Threading.ThreadStart(myMethod); 

System.Threading.Thread myThread; 
myThread = new System.Threading.Thread( myThreadStart ); 
myThread.Start(); 

for (int i=0; i<100; i++) 
{ 
   Console.Write("main thread"); 
} 

void myMethod() 
{ 
   for (int i=0; i<100; i++) 
   { 
      Console.Write("second thread"); 
   } 
} 

ParameterizedThreadStart Delegate

This has an argument of data type object.
This delegate only allows you to pass in a single parameter and does so in an unsafe way because it passes it as an object.

System.Threading.Thread myThread; 
myThread = new System.Threading.Thread (new Systm.Threading.ParameterizedThreadStart(myMethod) ); 

public static void myMethod(object myParam) 
{} 
myThread.Start(myObjectParameter);