Merge pull request #3669 from NotADucc/2390

create 2390-removing-stars-from-a-string.cs

Author: Ykhan799

csharp/2390-removing-stars-from-a-string.cs

@@ -0,0 +1,21 @@
+public class Solution 
+{
+    public string RemoveStars(string s) 
+    {
+        var output = new StringBuilder(s.Length);
+
+        foreach (var ch in s)
+        {
+            if (ch == '*')
+            {
+                output.Length--;
+            }
+            else 
+            {
+                output.Append(ch);
+            }
+        }
+
+        return output.ToString();
+    }
+}