Program:

The source code to sort 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 sort an array using the 
//predefined method.

using System;

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

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

Output:

Array after Sort() method:
10
20
30
40
50
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.Sort(intArr);

Here we sorted the elements of array "intArr" in the ascending order using the Sort() method of Array class and then print the sorted array on the console screen.