.NET Framework #Generate SHA1 checksum of a file function


Example

First you add System.Security.Cryptography and System.IO to your project

 public string GetSha1Hash(string filePath)
    {
        using (FileStream fs = File.OpenRead(filePath))
        {
            SHA1 sha = new SHA1Managed();
            return BitConverter.ToString(sha.ComputeHash(fs));
        }
    }