Question

I need to write text file from textbox on button’s click event

after writing it I need to open same file

does not need to save that file while writing.

can anyone please give sample code?

EDIT

Actually you take me wrong ,I need to create temporary file , not in already existed file.. need to create , write and at same time it will be open to read.. is it possible ?

Answer 1

Is this what you are looking for?

FileStream currentFileStream = null;//EDIT
string tempFilePath = Directory.GetCurrentDirectory() + "\\TEMP.txt";

if (!File.Exists(tempFilePath))
{
    currentFileStream = File.Create(tempFilePath);//creates temp text file
    currentFileStream.Close();//frees the file for editing/reading
}//if file does not already exist

File.WriteAllText(tempFilePath, textbox1.Text);//overwrites all text in temp file

//Inside your exit function:
if(File.Exists(tempFilePath)) File.Delete(tempFilePath);//delete temp file