Added c# version of Selection Sort algorithm

Author: jorgebaptista

Sorting/Selection Sort/C#/Program.cs

@@ -0,0 +1,46 @@
+using System;
+using System.Collections;
+using System.Collections.Generic;
+
+namespace Algorithms
+{
+    class Sort
+    {
+        static void Selection(int[] numbers)
+        {
+            for (int i = 0; i < numbers.Length - 1; i++)
+            {
+                int minIndex = i;
+
+                for (int j = i + 1; j < numbers.Length; j++)
+                {
+                    if (numbers[j] < numbers[minIndex]) minIndex = j;
+                }
+
+                if (minIndex != i)
+                { 
+                    Swap(ref numbers[minIndex], ref numbers[i]);
+                }
+            }
+        }
+
+        static void Swap(ref int a, ref int b)
+        {
+            int temp = a;
+            a = b;
+            b = temp;
+        }        
+
+        static void Main(string[] args)
+        {
+            int[] numbers = {5, 1, 7, 6, -4, 30, 2};
+
+            Selection(numbers);
+
+            foreach (int item in numbers)
+            {
+                Console.WriteLine(item.ToString());
+            }
+        }
+    }
+}