Asp.net writes logs to files

Using system;
Using system. IO;

Namespace writelog
{
/// <Summary>
/// Summary of writeinlog.
/// </Summary>
Public class writeinlog
{
Private string logfilename;
Private int logfilesizes;

/// <Summary>
/// Write the log file
/// </Summary>
Public writeinlog ()
{
Logfilename = @ "D: \ logfile.txt ";
}

/// <Summary>
/// Automatically delete the log file size. This method has been reloaded.
/// </Summary>
/// <Param name = "filesize"> log file size, in KB </param>
Public writeinlog (INT filesize): this ()
{
If (filesize! = 0)
{
This. logfilesizes = filesize * 1024;
}
Else
{
This. logfilesizes = 1024;
}
}
/// <Summary>
/// Complete log file name, for example, @ "D: \ logfile.txt"
/// </Summary>
Public String logfilename
{
Set
{
This. logfilename = value;
}
}

/// <Summary>
/// Write log information
/// </Summary>
/// <Param name = "MSG"> log content </param>
/// <Param name = "isautodelete"> whether to automatically delete logs </param>
Public void writeinlog (string MSG)
{
If (logfilesizes! = 0)
{
Writeinlog (MSG, true );
}
Else
{
Writeinlog (MSG, false );
}
}

/// <Summary>
/// Write log information
/// </Summary>
/// <Param name = "MSG"> log content </param>
/// <Param name = "isautodelete"> whether to automatically delete logs </param>
Private void writeinlog (string MSG, bool isautodelete)
{
Try
{
Fileinfo = new fileinfo (logfilename );
If (isautodelete)
{
If (fileinfo. exists & fileinfo. length> = logfilesizes)
{
Fileinfo. Delete ();
}
}
Using (filestream FS = fileinfo. openwrite ())
{
Streamwriter Sw = new streamwriter (FS );
Sw. basestream. Seek (0, seekorigin. End );
SW. writeline ("========================================== ");
Sw. Write ("add Date:" + datetime. Now. tostring () + "\ r \ n ");
Sw. Write ("log Content:" + MSG + "\ r \ n ");
SW. writeline ("========================================== ");
Sw. Flush ();
Sw. Close ();
}
}
Catch (exception ex)
{
Ex. tostring ();
}
}

}
}