Program:

The source code to reverse an integer array using the predefine method is given below. The given program is compiled and executed successfully on Microsoft Visual Studio.

//C# program to reverse an array 
//using the predefined method.

using System;

class Sample
{
    public static void Main()
    {
        int[] intArr = new int[5]{10,20,30,40,50};
        int loop = 0;

        Array.Reverse(intArr);
        
        Console.WriteLine("Array after Reverse() method: ");
        for (loop = 0; loop < intArr.Length; loop++)
        {
            Console.WriteLine("Element "+(loop+1)+" is "+intArr[loop]);
        }
    }
}

Output:

Array after Reverse() method:
Element 1 is 50
Element 2 is 40
Element 3 is 30
Element 4 is 20
Element 5 is 10
Press any key to continue . . .

Explanation:

In the above program, we created a Sample class that contains the Main() method. In the Main() method, we created an array of integers that contains 5 elements.

Array.Reverse(intArr);

Here we reversed the elements of array "intArr" using the Reverse() method of Array class and then print the reversed array on the console screen.