Question

Can I pass additional parameters to a predicate function?

I need it in a sorting process actually.

public void Sort(
    Comparison<T> comparison
)

where I would like to use the Comparison predicate in this form:

public delegate int Comparison<T>(
    T x,
    T y,
    object extraParameter
)

Is this possible?

Answer 1

No, but you can do this:

public Comparison<T> MakeComparison<T>(object extraParameter)
{
    return
        delegate(T x, T y) 
        {
            // do comparison with x, y and extraParameter
        }
}