VB.NET - Create a CSV file from an XML file?

This code will indeed create an Excel .csv file, but it's not a true CSV. All that will be contained in it is some gobbledygook which VB creates from dgvStats.Rows.ToString. I'm guessing that some kind of a For...Each is needed here, but I can't see how I would work that out.

As a side matter: I already have the query written in an earlier Sub, but if I try to give it global scope (in the Declarations section), the Subs access the query but throw a MissingMemberException. Is there some way I can do this without writing the query twice?

Thanks for your help!

Private Sub btnCreate_Click(sender As Object, e As EventArgs) Handles btnCreate.Click
    Dim StatsData As XElement = XElement.Load("Basketball.xml")
    Dim query = From p In StatsData.Descendants("player")
    Let name = p.<name>.Value
    Let team = p.<team>.Value
    Let points = CInt(p.<points>.Value)
    Let steals = CInt(p.<steals>.Value)
    Order By points Descending
    Select name, team, points, steals

    Dim sw As IO.StreamWriter = IO.File.CreateText("Basketball.csv")
    sw.WriteLine(dgvStats.Rows.ToString)
    sw.Close()
    MessageBox.Show("Basketball.csv created in bin\Debug folder. " &
                    "Use Windows Explorer to find it.")
End Sub