Data commit

Task/Letter-frequency/C-sharp/letter-frequency-1.cs

@@ -0,0 +1,37 @@
+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Linq;
+
+class Program
+{
+    static SortedDictionary<TItem, int> GetFrequencies<TItem>(IEnumerable<TItem> items)
+    {
+        var dictionary = new SortedDictionary<TItem, int>();
+        foreach (var item in items)
+        {
+            if (dictionary.ContainsKey(item))
+            {
+                dictionary[item]++;
+            }
+            else
+            {
+                dictionary[item] = 1;
+            }
+        }
+        return dictionary;
+    }
+
+    static void Main(string[] arguments)
+    {
+        var file = arguments.FirstOrDefault();
+        if (File.Exists(file))
+        {
+            var text = File.ReadAllText(file);
+            foreach (var entry in GetFrequencies(text))
+            {
+                Console.WriteLine("{0}: {1}", entry.Key, entry.Value);
+            }
+        }
+    }
+}

Task/Letter-frequency/C-sharp/letter-frequency-2.cs

@@ -0,0 +1,8 @@
+var freq =  from c in str
+            where char.IsLetter(c)
+            orderby c
+            group c by c into g
+            select g.Key + ":" + g.Count();
+
+foreach(var g in freq)
+    Console.WriteLine(g);