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You can find a lot of debugging and deploying problems while developing applications in .NET and Visual Basic here. There are also some querying tips in SQL and typical source codes which might be useful shared here.

Check whether a file exists or not

This is actually a simple code, but someones may not know it when first using VB, so I post it here.
Here's the code to find a file named file.txt:
If Dir(App.Path & "\file.txt") <> "" Then
MsgBox "Found: file.txt"
End If
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