Remove duplicates from Sorted Array

If array is a sorted array, use two pointer approach to find the position of non duplicate items in the array.

public class Solution {
public int RemoveDuplicates(int[] nums)
{
int len=0;
if(nums.Length==0)
{ return 0; }

 for(int i=0;i<nums.Length-1;i++) { if( nums[i]!=nums[i+1]) { len=len+1; nums[len]=nums[i+1]; } } return len+1; } 

}