Write data to txt file without rewritting

Question

Hi I have a code same as below: I define it in globally : TextWriter file = new StreamWriter(C:\Hello.txt true); this give an error for (i=0;i { double FPRate = (double)FP1.Count() / (FP1.Count() + TN1.Count()) * 100; double DetectionRate = (double)TP1.Count() / (TP1.Count() + FN1.Count()) * 100; file.Write(FPRate); file.Close();

Hemant Srivastava · Answer

What error you are getting? Could you paste more coding so that I could try to figure it out?

diamond diamond · Answer

Thanks Hemant but it doesn't work with your solution.

Hemant Srivastava · Answer

If file.Close() is within for loop then on first iteration file stream gets closed and after that you would get an error. If this is the case you need to take out file.Close() outside of the loop. I'd prefer code like: using( TextWriter file = new StreamWriter(C:\Hello.txt true)) { for (i=0;i { double FPRate = (double)FP1.Count() / (FP1.Count() + TN1.Count()) * 100; double DetectionRate = (double)TP1.Count() / (TP1.Count() + FN1.Count()) * 100; file.Write(FPRate); } } Here 'using' clause will take care of closing file stream itself.