C#通过Oracle.ManagedDataAccess无法访问Oralce

问题描述：
通过C#引用Oracle.ManagedDataAccess.dll访问Oracle，写了如下一段代码，在本机能正常访问，但是将编译后的exe放到服务器上面就无法访问了，一直提示登录失败。
而服务器上面的pl/sql却能够正常访问数据库。

static void Main(string[] args)
{
    string connStr=string.Empty;
    try
    {
        connStr = string.Format(@"User Id={3};Password={4};  Data Source=(description=(address_list = (address = (HOST = {0})(PROTOCOL = TCP)(PORT= {1})))(connect_data=(service_name={2})));", "172.23.11.152", "1521", "orcl", "system", "oracle123");
        using (OracleConnection conn = new OracleConnection(connStr))
        {
            OracleCommand comm = new OracleCommand("select count(1) from wifi.site_info", conn);
            conn.Open();
            object a = comm.ExecuteScalar();
            conn.Close();

            Console.WriteLine(a);
        }
    }
    catch (Exception ex)
    {
        Console.WriteLine(ex.ToString());
        Console.WriteLine("连接字符串:" + connStr);
    }

    Console.Read();
}

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