Initial data commit

Task/SHA-1/C-sharp/sha-1.cs

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+using System;
+using System.Security.Cryptography;
+using System.Text;
+using Microsoft.VisualStudio.TestTools.UnitTesting;
+
+namespace RosettaCode.SHA1
+{
+    [TestClass]
+    public class SHA1CryptoServiceProviderTest
+    {
+        [TestMethod]
+        public void TestComputeHash()
+        {
+            var input = new UTF8Encoding().GetBytes("Rosetta Code");
+            var output = new SHA1CryptoServiceProvider().ComputeHash(input);
+            Assert.AreEqual(
+                "48-C9-8F-7E-5A-6E-73-6D-79-0A-B7-40-DF-C3-F5-1A-61-AB-E2-B5",
+                BitConverter.ToString(output));
+        }
+    }
+}