写日志
......\log
......\...\App.config
......\...\bin
......\...\...\Debug
......\...\Form1.cs
......\...\Form1.Designer.cs
......\...\Form1.resx
......\...\log.csproj
......\...\log.csproj.user
......\...\log4net.dll
......\...\obj
......\...\...\Debug
......\...\...\log.csproj.FileList.txt
......\...\Program.cs
......\...\Properties
......\...\..........\AssemblyInfo.cs
......\...\..........\Resources.Designer.cs
......\...\..........\Resources.resx
......\...\..........\Settings.Designer.cs
......\...\..........\Settings.settings
......\log.sln