streamreader

I have some .csv files which I'm using as part of a test bench. I can open them and read them without any problems unless I've already got the file open in Excel in which case I get an IOException : System.IO.IOException : The process cannot access the file 'TestData.csv' because it is being used by another process. This is a snippet from the test bench: using (CsvReader csv = new CsvReader(new StreamReader(new FileStream(fullFilePath, FileMode.Open, FileAccess.Read)), false)) { // Process the file } Is this a limitation of StreamReader? I can open the file in other applications (Notepad++ for

My code so far StreamReader reading = File.OpenText("test.txt"); string str; while ((str = reading.ReadLine())!=null) { if (str.Contains("some text")) { StreamWriter write = new StreamWriter("test.txt"); } } I know how to find the text, but I have no idea on how to replace the text in the file with my own. Read all file content. Make a replacement with String.Replace . Write content back to file. string text = File.ReadAllText("test.txt"); text = text.Replace("some text", "new value"); File.WriteAllText("test.txt", text); You're going to have a hard time writing to the same file you're reading

Classes such as Stream , StreamReader , StreamWriter etc implements IDisposable interface. That means, we can call Dispose() method on objects of these classes. They've also defined a public method called Close() . Now that confuses me, as to what should I call once I'm done with objects? What if I call both? My current code is this: using (Stream responseStream = response.GetResponseStream()) { using (StreamReader reader = new StreamReader(responseStream)) { using (StreamWriter writer = new StreamWriter(filename)) { int chunkSize = 1024; while (!reader.EndOfStream) { char[] buffer = new char