C Sharp Program how to Display Results using Delegate

using System;
public class DelegateSum
{
    public delegate int DelegateResulteHandler(int x, int y);
    static void Main(string[] args)
    {
        Results Results = new Results();
        DelegateResulteHandler sum = new DelegateResulteHandler(Results.sum );
        int result = sum (30, 70);
        Console.WriteLine("Result is: " + result);
        Console.ReadLine();
    }
}

public class Results
{
    public int sum (int x, int y)
    {
        return x + y;
    }
}
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OUTPUT:
                    Result is: 100
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