[RESOLVED] file doesn't close?

i'm trying to make an updater for a program and i do this by checking the md5 of the file, but it seems that if i try to delete the file after getting the md5 i get an error saying its its being used by another process?

Code:

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            Dim md5 As MD5CryptoServiceProvider = New MD5CryptoServiceProvider
            Dim f As FileStream = New FileStream(filepath, FileMode.Open, FileAccess.Read, FileShare.Read, 8192)
            f = New FileStream(filepath, FileMode.Open, FileAccess.Read, FileShare.Read, 8192)
            md5.ComputeHash(f)

            Dim hash As Byte() = md5.Hash
            Dim buff As StringBuilder = New StringBuilder
            Dim hashByte As Byte

            For Each hashByte In hash
                buff.Append(String.Format("{0:x2}", hashByte))
            Next

            f.Close()

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oops i just noticed i had this line:

Code:

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f = New FileStream(filepath, FileMode.Open, FileAccess.Read, FileShare.Read, 8192)

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i removed it and it successfully closed now