线程返回值 C#

public int login(){
return 123;
}

用线程启动login怎么获得它的返回值，同时窗体怎么知道该线程结束了，希望有详细点的例子

把对象当作参数，把需要返回的对象的指针传过去。

partial class ThreadParameter
{
public int a;
public int b;
public int result;
}

class Program
{
static void Main( string[] args )
{
Thread thread = new Thread( ThreadProc );
ThreadParameter parameter = new ThreadParameter();
parameter.a = 100;
parameter.b = 0;
parameter.result = 0;
thread.Start( parameter );

while ( thread.IsAlive )
{
Console.WriteLine( ", b = ", DateTime.Now, parameter.b );
Thread.Sleep( 1000 );
}

Console.ReadKey();
}

static void ThreadProc( object parameter )
{
ThreadParameter p = ( ThreadParameter ) parameter;
int c;
for ( int i = 0; i < 100; i++ )
{
c = i;
p.b = c;
Thread.Sleep( 500 );
}
p.result = ( int ) DateTime.Now.Ticks;
}
}