小编Kie*_*gas的帖子

我正在学习构建聊天客户端和服务器的教程，现在我遇到了以下错误：

Inconsistent accessibility: field type 'System.Collections.Concurrent.ConcurrentDictionary<string,ChattingServer.ConnectedClient>' is less accessible than field 'ChattingServer.ChattingService._connectedClients' c:\Users\KOEMXE\Documents\Visual Studio 2012\Projects\ChatApplication\ChattingServer\ChattingService.cs 17  62  ChattingServer

这是相关问题所在的类文件 (ChattingService.cs)：

using ChattingInterfaces;
using System;
using System.Collections.Concurrent;
using System.Collections.Generic;
using System.Linq;
using System.Runtime.Serialization;
using System.ServiceModel;
using System.Text;

namespace ChattingServer
{
    [ServiceBehavior(ConcurrencyMode = ConcurrencyMode.Multiple, InstanceContextMode = InstanceContextMode.Single)]
    public class ChattingService : IChattingService
    {
        //private ConnectedClient _connectedClients;

        public ConcurrentDictionary<string, ConnectedClient> _connectedClients = new ConcurrentDictionary<string, ConnectedClient>();

        public int Login(string userName)
        {
            //is anyone else logged in with my name?
            foreach (var client in _connectedClients) …