private static extern int external_call(Functions.AddTwoIntsDelegate func, int i, int j);
/// <summary>
/// Evaluate a function with integer inputs
/// </summary>
/// <param name="func">A delegate to a function taking two ints as input and returning an int</param>
/// <param name="i">An integer</param>
/// <param name="j">An integer</param>
/// <returns>The result of the function</returns>
public int ExternalCall(Functions.AddTwoIntsDelegate func, int i, int j)
{
return(external_call(func, i, j));
}