Very Starnge outputs between Print & File!?

[mktrend]

Using the below code, the Last is printed to the output just fine which matches with the T&S perfectly. However using the second line of code after the Print statement to wrtite the same data to a .txt file causes some additional data which seem to be the Bid Ask data to be added to the file although the code below is not asking for it?!
What’s wrong with my code below which BTW are extracts from the NT supplied samples.
Thanks

protected override void OnMarketData(MarketDataEventArgs e)
{
if (e.MarketDataType == MarketDataType.Last)
Print(e.Time + ", L ," + e.Price + ", " + e.Volume );
string myString = (e.Time + ", L ," + e.Price + ", " + e.Volume) + Environment.NewLine;
File.AppendAllText(path, myString);
}

Data printed to output Data written to file

4/10/2008 4:13:14 PM, L ,1363, 40 4/10/2008 4:13:14 PM, L ,1363, 40
4/10/2008 4:13:14 PM, L ,1363, 275 4/10/2008 4:13:14 PM, L ,1363, 275
Extra Data written to file! 4/10/2008 4:13:14 PM, L ,1362.75, 1168
Extra Data written to file! 4/10/2008 4:13:14 PM, L ,0, 1777351
Extra Data written to file! 4/10/2008 4:13:14 PM, L ,1363, 275
Extra Data written to file! 4/10/2008 4:13:14 PM, L ,1363.25, 823
Extra Data written to file! 4/10/2008 4:13:14 PM, L ,1363, 226
Extra Data written to file! 4/10/2008 4:13:14 PM, L ,0, 1777352
4/10/2008 4:13:14 PM, L ,1363, 1 4/10/2008 4:13:14 PM, L ,1363, 1
Extra Data written to file! 4/10/2008 4:13:14 PM, L ,1363.25, 748
Extra Data written to file! 4/10/2008 4:13:14 PM, L ,1363, 325
Extra Data written to file! 4/10/2008 4:13:14 PM, L ,0, 1777373
4/10/2008 4:13:14 PM, L ,1363, 21 4/10/2008 4:13:14 PM, L ,1363, 21

[NinjaTrader_Ray]

The results you are getting is exactly what you have coded...

You need to encapsulate with curly braces:

[FONT=Courier New][COLOR=#0000ff]protected[/COLOR] [COLOR=blue]override[/COLOR] [COLOR=blue]void[/COLOR] OnMarketData(MarketDataEventArgs e)[/FONT]
[FONT=Courier New]{[/FONT]
[FONT=Courier New][COLOR=blue]   if[/COLOR] (e.MarketDataType == MarketDataType.Last)[/FONT]
[FONT=Courier New]   {[/FONT]
[FONT=Courier New]   Print(e.Time + [COLOR=maroon]", L ,"[/COLOR] + e.Price + [COLOR=maroon]", "[/COLOR] + e.Volume );[/FONT]
[FONT=Courier New][COLOR=blue]   string[/COLOR] myString = (e.Time + [COLOR=maroon]", L ,"[/COLOR] + e.Price + [COLOR=maroon]", [/COLOR]+  e.Volume) +[COLOR=teal] Environment[/COLOR].NewLine;[/FONT]
[FONT=Courier New][COLOR=teal]   File[/COLOR].AppendAllText(path, myString);[/FONT]
[FONT=Courier New]   }[/FONT]
[FONT=Courier New]}[/FONT]

[mktrend]

Ray,
Thanks you so much for your prompt response.
Obviously a beginner still on training wheels here .