Initial data commit

Task/Combinations/C-sharp/combinations-3.cs

@@ -0,0 +1,21 @@
+using System;
+class Combinations
+{
+  static int k = 3, n = 5;
+  static int [] buf = new int [k];
+
+  static void Main()
+  {
+    rec(0, 0);
+  }
+
+  static void rec(int ind, int begin)
+  {
+    for (int i = begin; i < n; i++)
+    {
+      buf [ind] = i;
+      if (ind + 1 < k) rec(ind + 1, buf [ind] + 1);
+      else Console.WriteLine(string.Join(",", buf));
+    }
+  }
+}