1929-concatenation-of-array.cs

public class Solution {
    public int[] GetConcatenation(int[] nums) {
        int n = nums.Length;
        int[] ans = new int[2 * n];
        
        for (int i = 0; i < n; i++) {
            ans[i] = nums[i];
            ans[i + n] = nums[i];
        }
        
        return ans;
    }
}