string line;

string[] segments;



System.IO.StringReader reader = new System.IO.StringReader(MyTextBox.Text);



line = reader.ReadLine();

while(!string.IsNullOrEmpty(line))

{

//-- Parse the line here. You may want to use a split at this point for segment delimitters (i.e. a pipe [|])

segments = line.Split(new char[] { '|' }, StringSplitOptions.None);



//-- Determine the segment type

switch(segments[0])

{

case "OBX":

{

//-- Place your OBX logic here

} break;

}



//-- Read the next line

line = reader.ReadLine();

}