Why cannot I assign the value of the sum of the integer elements of an array(taken as a argument in a function) to a variable ?

Question

I am using a function that takes an array as a argument and then assign the value of the sum of the elements by (y=<array name> . Sum) .
But it is not working. It is showing error saying "cannot convert method group Sum to non delegate int".why ????
I know how to find the sum in different ways but why is this method not working?

Answer 1

int[] arr = {10, 20, 30, 40, 50};
int r = arr.Sum();
Console.WriteLine(r);

Did you call the `Sum` method like that?