[RESOLVED] printing values a tab delimited array

[BumpaPumpa]

*EDIT*
This program has been changed so that it uses a 2 dimensional array instead of a 1 demensional array, so now instead of the data being stored as: ValueArray(0) = test 1, it will be saved as ValueArray(0, 0) = test 1
If you know how to write the contents of a text delimited file into a two dimensional array it would be appreciated

I'm writing an algorithm that reads the values in a tab delimited array and stores each value in an array, before writing the contents of each array index into a rich text box.

this is the file chr(9) is not written in the file but represents a tab spacing:
test1 chr(9) test2 chr(9) test3 chr(9) test(4) chr(9)

Declarations
Dim Importedfile As IO.StreamReader
Dim tempstring As String = My.Computer.FileSystem.ReadAllText(path + "Testfile.txt")
Dim Valuesarray(3) As String

Algorithm (on button click)
tempstring = Importedfile.ReadLine()
Valuesarray = tempstring.Split(New Char() {Chr(9)})
RichTextBox1.Text = Valuesarray(0) + Valuesarray(1) + Valuesarray(2) + Valuesarray(3)

Whenever i try to execute the code it says:
"An unhandled exception of type 'System.NullReferenceException' occurred in Tab delimited files.exe

Additional information: Object reference not set to an instance of an object."

and the line tempstring = Importedfile.Readline() is highlighted

thanks for helping