.NET - Is there any way to create a non-static thread method?

Question

Is there any way to create a non-static thread method at .NET? Show me code please.

The following code doesn't work:

ThreadStart ts = delegate { drawFloorAround(); };

public void drawFloorAround()
{
            ...
}

Gives this error -> "A field initializer cannot reference the non-static field, method, or property". If I change the method do static, it works. But I don't want to.

Answer 1

... gives this error "A field initializer cannot reference the non-static field, method, or property".

Read the error message more carefully. It is telling you precisely what is wrong. A field initializer cannot reference a non-static method. That's because the compiler is trying to protect you from this bug:

class C
{
    int foo;
    int bar = GetBar();
    public C(int newFoo)
    {
        this.foo = newFoo;
    }
    private int GetBar() { return this.foo + 1; }
}

You do "new C(123)". What is bar set to? If this were legal code then it would be set to 1, not 124. Why? Because first foo gets initialized to zero, then GetBar() gets called, then the constructor body sets this.foo to 123.

To prevent this bug it is simply illegal to reference an instance method or field in a field initializer.

Now, you might reasonably point out that in your code, you do not use the instance method, you only reference it. You never actually call it. This actually is safe. However, the rules of C# are designed to be simple and conservative; even though we could prove that this case is safe, we take the conservative, simple path and say that any reference to the instance in a field initializer is illegal.

If I change the method to static, it works.

Correct. In that case, the method does not depend upon instance state which has not yet been set up.

But I don't want to.

OK, then your only other choice is to stop using a field initializer. Put the initialization in the constructor; you then take responsibility for ensuring that the initialization does not accidentally use uninitialized state.