多线程写文件

创建命令实体类：Command

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace EMNewsInfo
{
    /// <summary>
    /// 命令实体
    /// </summary>
    public class Command : ICloneable
    {
        public const string COPY = "copy";
        public const string DELETE = "delete";
        public const string RENAME = "rename";

        /// <summary>
        /// 命令编号
        /// </summary>
        public string Id
        {
            get;
            set;
        }

        /// <summary>
        /// 创建时间
        /// </summary>
        public DateTime CTime
        {
            get;
            set;
        }

        /// <summary>
        /// 本地路径
        /// </summary>
        public string LocalPath
        {
            get;
            set;
        }

        /// <summary>
        /// 本地Ip
        /// </summary>
        public string ServerIp
        {
            get;
            set;
        }

        public int Port
        {
            get;
            set;
        }

        public byte[] Data
        {
            get;
            set;
        }

        /// <summary>
        /// 服务器路径
        /// </summary>
        public string ServerPath
        {
            get;
            set;
        }

        /// <summary>
        /// 总字节数
        /// </summary>
        public long Count
        {
            get;
            set;
        }

        /// <summary>
        /// 命令类型
        /// </summary>
        public string Type
        {
            get;
            set;
        }

        /// <summary>
        /// 状态 
        /// 0.未处理
        /// 1.已处理
        /// </summary>
        public int State
        {
            get;
            set;
        }

        #region ICloneable 成员

        public object Clone()
        {
            var t = new Command();
            t.Count = this.Count;
            t.CTime = this.CTime;
            t.Id = this.Id;
            t.LocalPath = this.LocalPath;
            t.ServerIp = this.ServerIp;
            t.ServerPath = this.ServerPath;
            t.Type = this.Type;
            return t;
        }

        #endregion
    }
}

创建连接池相关类：ConnectionPool

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Net.Sockets;
using System.Net;
using System.Threading;
using System.IO;

namespace EMNewsInfo
{
    public class ConnectionPool
    {
        private static System.Timers.Timer timer = new System.Timers.Timer();
        static ConnectionPool()
        {
            timer.Interval = Keep_Alive * 1000;
            timer.Elapsed += new System.Timers.ElapsedEventHandler(ClearOldCon);
            timer.Start();
        }

        private static void ClearOldCon(object sender, EventArgs e)
        {
            lock (dicCon)
            {
                foreach (var key in dicCon.Keys)
                {
                    var temp = dicCon[key];
                    for (int i = temp.Lst.Count - 1; i >= 0; i--)
                    {
                        var c = temp.Lst[i];
                        if (c.State == State.free && c.UpdateTime < DateTime.Now.AddSeconds(-Keep_Alive))
                        {
                            try
                            {
                                temp.Lst[i].CloseSocket();
                            }
                            catch
                            {
                            }
                            temp.Lst.RemoveAt(i);
                        }
                    }
                }
            }
        }

        private static int Keep_Alive = 30;

        private static Dictionary<string, ConnectionCollection> dicCon = new Dictionary<string, ConnectionCollection>();

        public static Dictionary<string, ConnectionCollection> DicCon
        {
            get
            {
                return dicCon;
            }
        }


        private static Mutex m_mutex = new Mutex();

        public static Connection GetConnection(string ip, int port)
        {
            try
            {
                m_mutex.WaitOne();
                lock (dicCon)
                {
                    string key = ip + "_" + port;
                    Connection con = null;
                    if (dicCon.ContainsKey(key))