I've used the following code to read the text from the file I have selected.
//Creating a new stream-reader and opening the file.
System.IO.StreamReader StreamReader1 = new System.IO.StreamReader(FileUpload1.PostedFile.InputStream);
//Reading Line from file
String text = StreamReader1.ReadLine();
//Writing the read line to textBox
TextBox1.Text = text;
//Close the file
Thanks for all the help this far its been really appreciated!