System.Threadin g.Thread Question

Hello, Newsgroupians:

I've two questions regarding the System.Threadin g.Thread namespace.

First, what is the point of having a ThreadStart parameter? For example...

using System.Threadin g;
Thread myThread;

myThread = new Thread(new ThreadStart(myF unc)); // This works
myThread = new Thread(myFunc); // And this works

Why not just make it easy and always use the second calling?

My second question is slightly more detailed.

I have a thread that I have created in a class...

using System.Threadin g;

public struct MyPoint
{
public float x;
public float y;
}

Thread m_myThread;
MyPoint m_pt;

class MyClass
{
void ThreadStartFunc ()
{
m_pt.x = 1;
m_pt.y = 2;
m_myThread = new Thread(this.Som eThreadFunc);
}
void SomeThreadFunc( )
{
m_pt.x = 5;
m_pt.y = 6;
}
}

Now suppose I call ThreadStartFunc (); in it, I initialize x and y. When I
debug, I notice the value of x and y are INITIALLY 1 and 2 in the
SomeThreadFunc( ). Later in the thread I change the values, and the thread
terminates. However, when looking at the values in the main thread, I notice
that the values are still 1 and 2. Can someone explain why this is
happening? Thank you for your assistance.
Trecius