New StreamWriter("FileName", True)
Imports System
Imports System.IO
Imports System.Text
Public Class Test
Public Shared Sub Main()
Dim FileName As String= "test.txt"
Dim TextToAdd As String = "data"
Dim Fs As FileStream = New FileStream(FileName, FileMode.CreateNew, FileAccess.Write, FileShare.None)
Dim SwFromFileTrue As StreamWriter = New StreamWriter(FileName, True)
SwFromFileTrue.Write(TextToAdd)
SwFromFileTrue.Flush()
SwFromFileTrue.Close()
End Sub
End Class
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