C# easy solution.
\n# Complexity\n- Time complexity: 33 ms.\n Add your time complexity here, e.g. O(n) \n\n- Space complexity: 26.6 Mb.\n Add your space complexity here, e.g. O(n
\n# Complexity\n- Time complexity: 33 ms.\n<!-- Add your time complexity here, e.g. $$O(n)$$ -->\n\n- Space complexity: 26.6 Mb.\n<!-- Add your space complexity here, e.g. $$O(n)$$ -->\n\n# Code\n```\npublic class Solution {\n    public int SmallestEvenMultiple(int n) {\n      return n%2==0? n:n*2;  \n    }\n}\n```
['Math', 'C#']