how to compare two images in an asp.net page

Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click

Dim file1 As String = My.Computer.FileSystem.ReadAllText("c:\images\5.bmp")

Dim file2 As String = My.Computer.FileSystem.ReadAllText("c:\images\5a.bmp")

If InStr(file1, file2) Then

' Using the above this will show files are the same

MessageBox.Show("Files are the same")

Else

MessageBox.Show("Files are not the same")

End If

End Sub

This is as simple as you can get.