c#日志生成

using System;
using System.Collections.Generic;
using System.IO;
using System.Text;

/// <summary>
/// 打印error类
/// </summary>
public class LogUtil
{
    private string path = string.Empty;
    private static Dictionary<long, long> lockDic = new Dictionary<long, long>();
    public LogUtil(string filePath, Enviroment enviroment)
    {
        switch (enviroment)
        {
            case Enviroment.HTTP:
                path = System.Web.Hosting.HostingEnvironment.MapPath(@"~/") + filePath;
                break;
            case Enviroment.CLIENT:
                path = Directory.GetCurrentDirectory() + "/" + filePath;
                break;
            default:
                break;
        }

        if (!Directory.Exists(path + "/Info"))
        {
            Directory.CreateDirectory(path + "/Info");
        }

        if (!Directory.Exists(path + "/Error"))
        {
            Directory.CreateDirectory(path + "/Error");
        }

        if (!Directory.Exists(path + "/Debug"))
        {
            Directory.CreateDirectory(path + "/Debug");
        }
    }

    private void Write(string path, string content)
    {
        if (!File.Exists(path))
        {
            using (FileStream fs = File.Create(path))
            {
                fs.Close();
            }
        }

        using (FileStream fs = new FileStream(path, FileMode.OpenOrCreate, FileAccess.ReadWrite, FileShare.ReadWrite, 8, FileOptions.Asynchronous))
        { 
            Byte[] dataArray = Encoding.Default.GetBytes(content + Environment.NewLine);
            bool flag = true;
            long slen = dataArray.Length;
            long len = 0;
            while (flag)
            {
                try
                {
                    if (len >= fs.Length)
                    {
                        fs.Lock(len, slen);
                        lockDic[len] = slen;
                        flag = false;
                    }
                    else
                    {
                        len = fs.Length;
                    }
                }
                catch (Exception ex)
                {
                    while (!lockDic.ContainsKey(len))
                    {
                        len += lockDic[len];
                    }
                }
            }
            fs.Seek(len, SeekOrigin.Begin);
            fs.Write(dataArray, 0, dataArray.Length);
            fs.Close();
        }
    }

    /// <summary>
    /// 日志写入
    /// </summary>
    /// <param name="str">要写入的字符串</param>
    /// <param name="isAppend">是否是文本追加</param>
    public void Error(string str, bool isAppend = true)
    {
        Write(path + "/Error/" + DateTime.Now.ToString("yyyyMMdd") + ".txt", DateTime.Now.ToString() + "---------" + str);
    }

    /// <summary>
    /// 日志写入
    /// </summary>
    /// <param name="str">要写入的字符串</param>
    /// <param name="isAppend">是否是文本追加</param>
    public void Debug(string str, bool isAppend = true)
    {

        Write(path + "/Debug/" + DateTime.Now.ToString("yyyyMMdd") + ".txt", DateTime.Now.ToString() + "---------" + str);
    }

    /// <summary>
    /// 日志写入
    /// </summary>
    /// <param name="str">要写入的字符串</param>
    /// <param name="isAppend">是否是文本追加</param>
    public void Info(string str, bool isAppend = true)
    {
        Write(path + "/Info/" + DateTime.Now.ToString("yyyyMMdd") + ".txt", DateTime.Now.ToString() + "---------" + str);
    }

    /// <summary>
    /// 程序运行环境
    /// </summary>
    public enum Enviroment
    {
        /// <summary>
        /// webapi环境
        /// </summary>
        HTTP,
        /// <summary>
        /// 客户端
        /// </summary>
        CLIENT
    }
}