Why is this piece of code not working

[Learned]

I have tried to look at it about 20 times but can't find any issue. Please bear in mind that I am a bit novice for c-sharp.

The console part works fine so my StoreArray is not having any problem but there is no output to the file.

string tempfilename = "F:\\Research\\Out_1_TickData.csv";
outfileName = @tempfilename;
StreamWriter outStream = new StreamWriter(outfileName, true);

                for (int p = 0; p < Row_StoreArray; ++p)
                {
                    for (int q = 0; q < Col_StoreArray; ++q )
                    {
                        Console.Write("," + StoreArray[p, q]);
                        outStream.Write("," + StoreArray[p, q] );
                    }
                    Console.WriteLine(",");
                    outStream.WriteLine(",");
                }

Thanks in advance.

[BioPhysEngr]

First - it's hard to help you debug if we don't know what you're expecting and what behavior you are observing.

General thoughts though:

(1) Call StreamWriter.Close() afterward
(2) What's with the @ in outfilename=@tempfilename. That is unusual syntax and probably unnecessary (to the extent that I wasn't even sure it was syntactically legal without checking).

My preferred method of doing this is to buffer everything first and then do one disk IO event:

System.Text.StringBuilder outData = new System.Text.StringBuilder();
for(int p; ...)
{
    for(int q; ...)
    {
        outData.Append("your data here");
    }
    outData.AppendLine(); //New line at end of row
}

System.IO.File.WriteAllText(outfileName, outData.ToString()); //Write to disk