using System;using System.Collections.Generic;using System.Linq;using System.Text;using System.IO;using System.Configuration;using System.Reflection;namespace LogHelper.Common{    public class LogHelper    {        private string logFile = "";        /// <summary>        /// 不带参数的构造函数        /// </summary>        public LogHelper()        {            try            {                string logPath = Path.Combine(System.Environment.CurrentDirectory,DateTime.Now.ToString("yyyyMM"));                logFile = Path.Combine(logPath,DateTime.Now.ToString("yyyyMMdd") + ".txt");                if (!Directory.Exists(logPath))                    Directory.CreateDirectory(logPath);                if (!File.Exists(logFile))                    File.Create(logFile);            }            catch            {            }        }        /// <summary>        /// 带参数的构造函数        /// </summary>        /// <param name="logFile"></param>        public LogHelper(string logFile)        {            try            {                this.logFile = logFile;                if (!File.Exists(logFile))                {                    File.Create(logFile);                }            }            catch { }        }        /// <summary>        /// 追加一条信息        /// </summary>        /// <param name="text"></param>        public void Write(string text)        {            try            {                using (StreamWriter sw = new StreamWriter(logFile, true, Encoding.UTF8))                {                    sw.Write(DateTime.Now.ToString("[yyyy-MM-dd HH:mm:ss] ") + text);                }            }            catch { }        }        /// <summary>        /// 追加一条信息        /// </summary>        /// <param name="logFile"></param>        /// <param name="text"></param>        public void Write(string logFile, string text)        {            try            {                using (StreamWriter sw = new StreamWriter(logFile, true, Encoding.UTF8))                {                    sw.Write(DateTime.Now.ToString("[yyyy-MM-dd HH:mm:ss] ") + text);                }            }            catch { }        }        /// <summary>        /// 追加一行信息        /// </summary>        /// <param name="text"></param>        public void WriteLine(string text)        {            try            {                text += "\r\n";                using (StreamWriter sw = new StreamWriter(logFile, true, Encoding.UTF8))                {                    sw.Write(DateTime.Now.ToString("[yyyy-MM-dd HH:mm:ss] ") + text);                }            }            catch { }        }        /// <summary>        /// 追加一行信息        /// </summary>        /// <param name="logFile"></param>        /// <param name="text"></param>        public void WriteLine(string logFile, string text)        {            try            {                text += "\r\n";                using (StreamWriter sw = new StreamWriter(logFile, true, Encoding.UTF8))                {                    sw.Write(DateTime.Now.ToString("[yyyy-MM-dd HH:mm:ss] ") + text);                }            }            catch { }        }    }}

 LogHelper.Common.LogHelper logHelper = new Common.LogHelper();logHelper.WriteLine("你好");

string logPath = Path.Combine(System.Environment.CurrentDirectory,DateTime.Now.ToString("yyyyMM"));                logFile = Path.Combine(logPath,DateTime.Now.ToString("yyyyMMdd") + ".txt");