I have 3 functions. They can be called in any order (later they may need specific order). The return value of one function should be the first param of the next. How do i do this? what i am thinking is something like the below. Whats the best way to do this?

string void fn(string sz, data d, eventhdl nextFunc)
{
    //do stuff
    if(nextFunc == null)
        return ret;
    else
        return nextFunc(ret, d, nextFunc.Next);
}