✨ Add StreamExtensions

GetHash<T>() computes the hash of the given stream using the specified
hashing algorithm.

X10D/StreamExtensions.cs

@@ -0,0 +1,30 @@
+namespace X10D
+{
+    #region Using Directives
+
+    using System;
+    using System.IO;
+    using System.Reflection;
+    using System.Security.Cryptography;
+
+    #endregion
+
+    /// <summary>
+    /// A set of extension methods for <see cref="Stream"/>.
+    /// </summary>
+    public static class StreamExtensions
+    {
+        /// <summary>
+        /// Returns the hash of a stream using the specified hashing algorithm.
+        /// </summary>
+        /// <typeparam name="T">A <see cref="HashAlgorithm"/> derived type.</typeparam>
+        /// <param name="stream">The stream whose hash is to be computed.</param>
+        /// <returns>Returns a <see cref="Byte"/> array representing the hash of the stream.</returns>
+        public static byte[] GetHash<T>(this Stream stream) where T : HashAlgorithm
+        {
+            MethodInfo create = typeof(T).GetMethod("Create", new Type[] { });
+            using T    crypt  = (T)create?.Invoke(null, null);
+            return crypt?.ComputeHash(stream);
+        }
+    }
+}

X10D/X10D.csproj

@@ -58,6 +58,7 @@
     <Compile Include="ListExtensions.cs" />
     <Compile Include="Properties\AssemblyInfo.cs" />
     <Compile Include="RandomExtensions.cs" />
+    <Compile Include="StreamExtensions.cs" />
     <Compile Include="StringExtensions.cs" />
     <Compile Include="StructExtensions.cs" />
     <Compile Include="TimeSpanExtensions.cs" />