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public static string GetMD5Hash(string pathName) { string strResult = ""; string strHashData = ""; byte[] arrbytHashValue; System.IO.FileStream oFileStream = null; System.Security.Cryptography.MD5CryptoServiceProvider oMD5Hasher= try { oFileStream = GetFileStream(pathName); arrbytHashValue = oMD5Hasher.ComputeHash(oFileStream); oFileStream.Close(); strHashData = System.BitConverter.ToString(arrbytHashValue); strHashData = strHashData.Replace("-", ""); strResult = strHashData; } catch(System.Exception ex) { System.Windows.Forms.MessageBox.Show(ex.Message, "Error!", System.Windows.Forms.MessageBoxButtons.OK, System.Windows.Forms.MessageBoxIcon.Error, System.Windows.Forms.MessageBoxDefaultButton.Button1); } return(strResult); }
URL: http://www.codeproject.com/KB/files/dt_file_hasher.aspx