Private Function RunScript(ByVal scriptText As String) As String

    ' create Powershell runspace
    Dim MyRunSpace As Runspace = RunspaceFactory.CreateRunspace()

    ' open it
    MyRunSpace.Open()

    ' create a pipeline and feed it the script text
    Dim MyPipeline As Pipeline = MyRunSpace.CreatePipeline()

    MyPipeline.Commands.AddScript(scriptText)

    ' add an extra command to transform the script output objects into nicely formatted strings
    ' remove this line to get the actual objects that the script returns. For example, the script
    '"Get-Process" returns a collection of System.Diagnostics.Process instances.
    MyPipeline.Commands.Add("Out-String")

    ' execute the script
    Dim results As Collection(Of PSObject) = MyPipeline.Invoke()

    ' close the runspace
    MyRunSpace.Close()

    ' convert the script result into a single string
    Dim MyStringBuilder As New StringBuilder()

    For Each obj As PSObject In results
        MyStringBuilder.AppendLine(obj.ToString())
    Next

    ' return the results of the script that has
    ' now been converted to text
    Return MyStringBuilder.ToString()

End Function
' helper method that takes your script path, loads up the script
' into a variable, and passes the variable to the RunScript method
' that will then execute the contents
Private Function LoadScript(ByVal filename As String) As String

    Try

        ' Create an instance of StreamReader to read from our file.
        ' The using statement also closes the StreamReader.
        Dim sr As New StreamReader(filename)

        ' use a string builder to get all our lines from the file
        Dim fileContents As New StringBuilder()

        ' string to hold the current line
        Dim curLine As String =""

        ' loop through our file and read each line into our
        ' stringbuilder as we go along
        Do
            ' read each line and MAKE SURE YOU ADD BACK THE
            ' LINEFEED THAT IT THE ReadLine() METHOD STRIPS OFF
            curLine = sr.ReadLine()
            If curLine.Contains("") Then
                fileContents.AppendLine("$Folder=tbpath.selectedpath")
            Else
                fileContents.Append(curLine + vbCrLf)
            If curLine.Contains ($Folder="") Then
        Loop Until curLine Is Nothing

        ' close our reader now that we are done
        sr.Close()

        ' call RunScript and pass in our file contents
        ' converted to a string
        Return fileContents.ToString()

    Dim s As String ="$Folder ="""""

    If curLine.Contains("$Folder =""""") Then

    End If

If curLine.Contains ("$Folder =""""") Then
  fileContents.Append("$Folder =""" & tbpath.selectedpath &"""")
End If