doubt in asp.net

Imports System.IO
Imports System.Diagnostics

Public Sub writeToFile(ByVal strMsg As String)
        Dim strLogPath As String = ""
        Dim fs As FileStream
        Dim sw As StreamWriter
        
        strLogPath = filepath 'here give ur file path
        If File.Exists(strLogPath) = True Then
            fs = File.Open(strLogPath, FileMode.Append, FileAccess.Write)
            sw = New StreamWriter(fs)
        Else
            fs = File.Create(strLogPath)
            sw = New StreamWriter(fs)
        End If
        sw.WriteLine(strMsg)

        sw.Close()
        fs.Close()
    End Sub