/// <summary>
/// Return the MD5 for the specific part of the stream only.
/// </summary>
/// <returns></returns>
public string MD5CheckSum()
{
using (MemoryStream ms = new MemoryStream())
{
ThreadSafeStream.CopyTo(ms, Start, Length, 8000);
#if NETFX_CORE
var alg = Windows.Security.Cryptography.Core.HashAlgorithmProvider.OpenAlgorithm(Windows.Security.Cryptography.Core.HashAlgorithmNames.Md5);
var buffer = (new Windows.Storage.Streams.DataReader(ms.AsInputStream())).ReadBuffer((uint)ms.Length);
var hashedData = alg.HashData(buffer);
return(Windows.Security.Cryptography.CryptographicBuffer.EncodeToHexString(hashedData).Replace("-", ""));
#else
#if WINDOWS_PHONE
using (var md5 = new Tools.MD5Managed())
{
#else
using (var md5 = System.Security.Cryptography.MD5.Create())
{
#endif
return(BitConverter.ToString(md5.ComputeHash(ms)).Replace("-", ""));
}
#endif
}
}
