Mono.Cecil.CryptoService.ComputeHash C# (CSharp) Method

		public static byte [] ComputeHash (string file)
		{
			if (!File.Exists (file))
				return Empty<byte>.Array;

			const int buffer_size = 8192;

			var sha1 = new SHA1Managed ();

			using (var stream = new FileStream (file, FileMode.Open, FileAccess.Read, FileShare.Read)) {

				var buffer = new byte [buffer_size];

				using (var crypto_stream = new CryptoStream (Stream.Null, sha1, CryptoStreamMode.Write))
					CopyStreamChunk (stream, crypto_stream, buffer, (int) stream.Length);
			}

			return sha1.Hash;
		}
	}