Error in code

See more:

C#

ASP.NET

Hello..!!

i write code given below to encrypt text but i get error

string Does not contain definition for left.

the name Encoding is does not exist in current context.

actually this code is converted from VB.net to C#.net

anybody help me what can i do

private static string Encrypt(string strText, string strEncrKey)
    {
        byte[] byKey = { };
        byte[] IV = { 0x12, 0x34, 0x56, 0x78, 0x90, 0xab, 0xcd, 0xef };

        try
        {
            byKey = System.Text.Encoding.UTF8.GetBytes(string.Left(strEncrKey.ToString(), 8));
            //byKey = System.Text.Encoding.UTF8.GetBytes(string.left(strEncrKey, 8));

            DESCryptoServiceProvider des = new DESCryptoServiceProvider();
            byte[] inputByteArray = Encoding.UTF8.GetBytes(strText);
            MemoryStream ms = new MemoryStream();
            CryptoStream cs = new CryptoStream(ms, des.CreateEncryptor(byKey, IV), CryptoStreamMode.Write);
            cs.Write(inputByteArray, 0, inputByteArray.Length);
            cs.FlushFinalBlock();

            return Convert.ToBase64String(ms.ToArray());
        }
        catch (Exception ex)
        {
            return ex.Message;

        }
    }

Thanks in advance.