Add File.WriteAllBytes() (#45)

* Add File.WriteAllBytes

* Add dot to end of xml doc

FileSystem/FileIOLinux.cs

@@ -118,6 +118,12 @@ public byte[] ReadAllBytes(string filePath)
             }
         }
 
+        /// <inheritdoc />
+        public void WriteAllBytes(string filePath, byte[] bytes)
+        {
+            File.WriteAllBytes(filePath, bytes);
+        }
+
         /// <inheritdoc />
         public string ReadAllText(string filePath)
         {

FileSystem/FileIOWin.cs

@@ -122,6 +122,13 @@ public byte[] ReadAllBytes(string filePath)
             }
         }
 
+        /// <inheritdoc />
+        public void WriteAllBytes(string filePath, byte[] bytes)
+        {
+            TryAllowWritesOnFile(filePath);
+            File.WriteAllBytes(filePath, bytes);
+        }
+
         /// <inheritdoc />
         public string ReadAllText(string filePath)
         {

FileSystem/IFileIO.cs

@@ -124,6 +124,13 @@ public interface IFileIO
         /// <returns>A byte array containing the contents of the file.</returns>
         byte[] ReadAllBytes(string filePath);
 
+        /// <summary>
+        /// Creates a new file, writes the specified byte array to the file, and then closes the file. If the target file already exists, it is overwritten.
+        /// </summary>
+        /// <param name="filePath">Path to the file.</param>
+        /// <param name="bytes">The bytes to write to the file.</param>
+        void WriteAllBytes(string filePath, byte[] bytes);
+
         /// <summary>
         /// Reads all text in a file. If file does not exist it will return an empty string.
         /// </summary>