Merge pull request #3187 from Dalton-V/main

Added 1768-merge-strings-alternately.cs

Author: MHamiid

Diff for: csharp/1768-merge-strings-alternately.cs

@@ -0,0 +1,18 @@
+public class Solution
+{
+    public string MergeAlternately(string word1, string word2)
+    {
+        var result = string.Empty;
+        var firstPointer = 0;
+        var secondPointer = 0;
+        while (firstPointer < word1.Length || secondPointer < word2.Length)
+        {
+            if (firstPointer < word1.Length)
+                result += word1[firstPointer++];
+
+            if (secondPointer < word2.Length)
+                result += word2[secondPointer++];
+        }
+        return result;
+    }
+}