Reading lines from txt file in Windows 8

I’m trying to read a specific line from a txt file which contains 3 lines, but for some reason my code showing an error when I run it, can somebody please direct me to resolve this issue.

The code:

                Dim GeneralFolder As StorageFolder = Await localFolder.CreateFolderAsync("General", CreationCollisionOption.ReplaceExisting)
                Dim WriteToFile As StorageFile = Await GeneralFolder.CreateFileAsync("dataFile.txt", CreationCollisionOption.ReplaceExisting)
                Await FileIO.WriteTextAsync(WriteToFile, "line number 1")
                Await FileIO.WriteTextAsync(WriteToFile, "line number 2")
                Await FileIO.WriteTextAsync(WriteToFile, "line number 3")

                Dim ReadFromFile As StorageFile = Await GeneralFolder.GetFileAsync("dataFile.txt")
                If ReadFromFile IsNot Nothing Then
                    Dim LineOne As String() = Await FileIO.ReadLinesAsync(ReadFromFile)

                    Dim md As New Windows.UI.Popups.MessageDialog(LineOne(0), "message")
                    md.Commands.Add(New Windows.UI.Popups.UICommand("OK"))
                    Await md.ShowAsync()
                End If

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Unable to cast COM object of type 'System.__ComObject' to class type 'System.Object[]'. Instances of types that represent COM components cannot be cast to types that do not represent COM components; however they can be cast to interfaces as long as the underlying COM component supports QueryInterface calls for the IID of the interface.

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This error is pointing to

Dim LineOne As String() = Await FileIO.ReadLinesAsync(ReadFromFile)

Thank you all in advance

Eng. Ash