Can we invoke method outside the thread block by any technique in C#? so that we can use same thread method to invoke other methods as well.?

Question

e.g. Here in this example, if I want to start thread on method M1 this way, Purpose is I need to call M2, M3 on same thread method to avoid repeated code. Is this possible in C#?

static void Main()
{
    if(StartThread() => M1()) //I want to invoke Method M1 from here like this    
    {
        return;
    }
}        

private void StartThread()
{
    var t = new Thread(() => M1()); //I dont want to invoke Method M1 from here
    t.SetApartmentState(ApartmentState.STA);
    t.Start();
    t.Join();
}
    
private static void M1()
{
    throw new NotImplementedException();
}

Answer 1

Just use a delegate (e.g. an Action) and pass it to StartThread:

static void Main()
{
    if(StartThread(() => M1()))
        return;
}        

private void StartThread(Action a)
{
    var t = new Thread(() => a());         
    t.SetApartmentState(ApartmentState.STA);
    t.Start();
    t.Join();
}

private static void M1()
{
    throw new NotImplementedException();
}