Read file and c#

Again, the easy way is to use static class File and it's method File. If you look under the hood of the File. ReadAllLines method, you can find implementation similar to this. As it was previously written, the using statement disposes StreamReader and FileStream which closes the file. To reduce memory usage for large text files , you can process lines immediately instead of adding it to the list as in the previous example.

All of the above-mentioned ways to read a file are illustrated in the example code given below. WriteLine "Reading File using File. ReadAllText file ; Console. WriteLine ; Console. ReadAllLines file ; foreach string ln in lines Console.

Close ; Console. Or you can use the Visual Studio. Here, we have a text file named as Textfile. WriteAllText and File. WriteAllText writes the entire file at once. It takes two arguments, the path of the file and the text that has to be written.

WriteAllLines writes a file one line at a time. It takes two arguments, the path of the file and the text that has to be written, which is a string array. There is another way to write to a file and that is by using a StreamWriter object. The StreamWriter also writes one line at a time. All of the above-mentioned ways to write to a text file are illustrated in the example code given below. WriteLine File. Mahesh Chand Updated date Feb 04, One more way to read a text file is using a StreamReader class that implements a TextReader and reads characters from a byte stream in a particular encoding.

The complete code sample uses the above-discussed methods to read a text file and display its content to the console. Next Recommended Reading. Net Core 6.

Create A. In the above code, we are using File. Exists to check if file exists or not, at specified location. If we know that a particular file is text file, we can use specialized classes to operate on it as described above. In the general case, however, a file is just an array of bytes. The most general way to read and write files is using the Stream class. Executing the above Code in Visual Studio will create another file testfile2.

So, this is where we can use buffered streams , which decide how much data to read and write to the disk and when Using the BufferedStream class makes reads and writes more efficient. Since it may have already fetched more data from disk than previously requested, a Read might only have to read in-memory data instead of going to the disk.

Notice the call to Flush on the output stream, since the buffered stream may not write the data to disk immediately, we need to explicitly make sure they have been written before we exit. Ask a question Contribute an article Questions Articles. Posted By :- manish.