2016 Update

Task/Remove-lines-from-a-file/C-sharp/remove-lines-from-a-file.cs

@@ -0,0 +1,19 @@
+using System;
+using System.IO;
+
+public class Rosetta
+{
+    /* C# 6 version:
+    public static void Main() => RemoveLines("foobar.txt", start: 1, count: 2);
+    */
+
+    public static void Main() {
+        RemoveLines("foobar.txt", start: 1, count: 2);
+    }
+
+    static void RemoveLines(string filename, int start, int count = 1) {
+        //Reads and writes one line at a time, so no memory overhead.
+        File.WriteAllLines(filename, File.ReadAllLines(filename)
+            .Where((line, index) => index < start - 1 || index >= start + count - 1));
+    }
+}