CS0103 C＃当前上下文中不存在该名称

Question

您好我在运行c＃代码时遇到问题，这里是代码段

namespace LDAP
{
    class Program
    {
        static void Main(string[] args)
        {
            // Creating an LdapConnection instance 
            LdapConnection ldapConn = new LdapConnection();

            //Connect function will create a socket connection to the server
            ldapConn.Connect(ldapHost, ldapPort);

            //Bind function will Bind the user object Credentials to the Server
            ldapConn.Bind(userDN, userPasswd);
        }
    }
}

运行程序后，我收到以下错误消息 CS0103当前上下文中不存在名称“ldapHost”