Question

An array is defined of assumed elements like I have array like String[] strArray = new String[50];.

Now from 50 elements only some elements are assigned and remaining are left null then I want the number of assigned elements.

Like here only 30 elements are assigned then I want that figure.

Answer 1

You can use Enumerable.Count:

string[] strArray = new string[50];
...
int result = strArray.Count(s => s != null);

This extension method iterates the array and counts the number of elements the specified predicate applies to.