process call error

[asm]

Hi

I am running the below mention code in vb.net but problem is
when dir.txt already in c: drive it will read the text file
but if i delete the dir.txt file and create new one and in next line
try to read the same dir.txt file it will flash error "Could not find file c:\dir.txt"

Pls guide me .. why this type of problem accured..


thanks


asm

Imports System
Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
        Dim SFile As System.IO.File
        Dim VolRead As System.IO.StreamReader
        Dim ReadTxt As String
        Try
            If SFile.Exists("C:\DIR.TXT") Then
                System.Diagnostics.Process.Start("C:\Windows\System32\CMD.exe", " /C Del C:\DIR.TXT")
            End If
            System.Diagnostics.Process.Start("C:\Windows\System32\CMD.exe", " /C Dir C:  > C:\DIR.TXT")
            VolRead = New System.IO.StreamReader("C:\DIR.TXT")
            ReadTxt = VolRead.ReadToEnd()
            Label1.Text = "READING TEXT FILE OK.."
            VolRead.Close()
            If SFile.Exists("C:\Dir.txt") Then
                System.Diagnostics.Process.Start("C:\Windows\System32\CMD.exe", " /C Del C:\DIR.TXT")
            End If
        Catch ex As Exception
            Label1.Text = ex.Message
        End Try
    End Sub