IntegerOperationOperate Method

public static int Operate(
	Func<int, int> func,
	int operand
)

Public Shared Function Operate ( 
	func As Func(Of Integer, Integer),
	operand As Integer
) As Integer

public:
static int Operate(
	Func<int, int>^ func, 
	int operand
)

static member Operate : 
        func : Func<int, int> * 
        operand : int -> int 

using System;
namespace SampleClassLibrary.CodeExamples
{
    public class IntegerOperationExample  
    {
        public void Main() 
        {
            // Define an operator that squares its operand
            Func<int, int> square = (int operand) => operand * operand;

            // Define an operand
            int integer = 2;

            // Operate on it
            Console.WriteLine("Squaring {0}...", integer);
            int result = IntegerOperation.Operate(square, integer);
            Console.WriteLine("...the result is {0}.", result);

            // Check that an operator cannot be null
            try
            {
                IntegerOperation.Operate(null, 0);
            }
            catch (Exception e)
            {
                Console.WriteLine();
                Console.WriteLine("Cannot apply a null function:");
                Console.WriteLine(e.Message);
            }
        }
    }
}

// Executing method Main() produces the following output:
// 
// Squaring 2...
// ...the result is 4.
// 
// Cannot apply a null function:
// Value cannot be null.
// Parameter name: func