Initial data commit

Task/Entropy/C-sharp/entropy-1.cs

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+using System;
+using System.Collections.Generic;
+namespace Entropy
+{
+	class Program
+	{
+		public static double logtwo(double num)
+		{
+			return Math.Log(num)/Math.Log(2);
+		}
+		public static void Main(string[] args)
+		{
+		label1:
+			string input = Console.ReadLine();
+			double infoC=0;
+			Dictionary<char,double> table = new Dictionary<char, double>();
+
+			
+			foreach (char c in input)
+			{
+				if (table.ContainsKey(c))
+					table[c]++;
+				    else
+				    	table.Add(c,1);
+	
+			}
+			double freq;
+			foreach (KeyValuePair<char,double> letter in table)
+			{
+				freq=letter.Value/input.Length;
+				infoC+=freq*logtwo(freq);
+			}
+			infoC*=-1;
+			Console.WriteLine("The Entropy of {0} is {1}",input,infoC);
+			goto label1;
+		
+		}
+	}
+}