Initial data commit

Task/Least-common-multiple/C-sharp/least-common-multiple.cs

@@ -0,0 +1,16 @@
+Using System;
+class Program
+{
+    static int gcd(int m, int n)
+    {
+        return n == 0 ? Math.Abs(m) : gcd(n, n % m);
+    }
+    static int lcm(int m, int n)
+    {
+        return Math.Abs(m * n) / gcd(m, n);
+    }
+    static void Main()
+    {
+        Console.WriteLine("lcm(12,18)=" + lcm(12,18));
+    }
+}