C# SHA256加密算法记录

using System.Text;
using System.Diagnostics;
using System.Security;
using System.Security.Cryptography;

protected void Page_Load(object sender, EventArgs e)
    {
        string salted = "abcdefghijklm";
        string digest = SHA256Encrypt(salted);

        byte[] b = System.Text.Encoding.Default.GetBytes(digest);

        Response.Write(Convert.ToBase64String(b));
        Response.End();
    }

    public string SHA256Encrypt(string strIN)
    {
        //string strIN = getstrIN(strIN);
        byte[] tmpByte;
        SHA256 sha256 = new SHA256Managed();

        tmpByte = sha256.ComputeHash(GetKeyByteArray(strIN));
        sha256.Clear();

        return GetStringValue(tmpByte);

    }

    private string GetStringValue(byte[] Byte)
    {
        string tmpString = "";
        ASCIIEncoding Asc = new ASCIIEncoding();
        tmpString = Asc.GetString(Byte);
        return tmpString;
    }

    private byte[] GetKeyByteArray(string strKey)
    {
        ASCIIEncoding Asc = new ASCIIEncoding();

        int tmpStrLen = strKey.Length;
        byte[] tmpByte = new byte[tmpStrLen - 1];

        tmpByte = Asc.GetBytes(strKey);

        return tmpByte;

    }