Retrieved md5 hashed password

I am trying to retrieved md5 hashed password from the database but the code is erroring out when I tried to convert the hashed password to string

query = string.Format("SELECT password, active FROM users WHERE name = '{0}'",login); command.CommandText = query; SqlDataReader readerCheckIfExists = command.ExecuteReader(); string dbPassword = readerCheckIfExists["password"].ToString(); int active = Convert.ToInt32(readerCheckIfExists["active"]);