How do we pass an array in a method in C#?

Pass array in a method as a method argument.

Let’s say the following is our array declaration and initialization.

MyArray app = new MyArray();
/* an int array with 5 elements */
int [] balance = new int[]{1000, 2, 3, 17, 50};

Now call the method getAverage() and pass the array as method argument.

double getAverage(int[] arr, int size) {
   // code
}

The following is the example showing how to pass an array in a method in C#.

Example

 Live Demo

using System;
namespace ArrayApplication {
   class MyArray {
      double getAverage(int[] arr, int size) {
         int i;
         double avg;
         int sum = 0;
         for (i = 0; i < size; ++i) {
            sum += arr[i];
         }
         avg = (double)sum / size;
         return avg;
      }
      static void Main(string[] args) {
         MyArray app = new MyArray();
         /* an int array with 5 elements */
         int [] balance = new int[]{1000, 2, 3, 17, 50};
         double avg;
         /* pass pointer to the array as an argument */
         avg = app.getAverage(balance, 5 ) ;
         /* output the returned value */
         Console.WriteLine( "Average value is: {0} ", avg );
         Console.ReadKey();
      }
   }
}

Output

Average value is: 214.4