How to write string in file using c#

IO; To create an instance of a StreamWriter object, you must define the location and filename of the file you wish to write.

Once the object is instantiated, you can use it to write content to the file. On Line 10, we have declared the path to the file we wish to write to.

If the file does not exist, the StreamWriter object will create it. Note, if you include only a filename "WriteFile. You can also use your system's environment variables to dynamically reference known folders. The following snippet is a better way to write Line 10 above, because the code becomes compatible across different machines.

Combine Environment. GetFolderPath Environment. Desktop , "WriteFile. By passing the filePath variable as an argument to the StreamWriter class, StreamWriter will create and write to the file in that location. Upgrade to Microsoft Edge to take advantage of the latest features, security updates, and technical support.

Feedback will be sent to Microsoft: By pressing the submit button, your feedback will be used to improve Microsoft products and services. Privacy policy. In this article, there are several examples showing various ways to write text to a file. The first two examples use static convenience methods on the System. The third example shows how to add text to a file when you have to process each line individually as you write to the file.

WriteLine readText ; The File. WriteAllText method writes a string to a file. Similar to the File. WriteAllLines method, the File. WriteAllText creates a new file if the file is not created. WriteAllText method to write a strings to a text file.

WriteAllBytes method writes a byte array to a file and closes the file. If the target file already exists, it is overwritten. View All. C Write To File. To write text to file in C , you can use System. WriteAllLines function or System. WriteAllText function. Or you can use WriteLine in recursive loop to write lines to a file.

It gives more control on each line to be written. WriteAllText writes string to a text file specified by the argument passed to the function. In the following example, we get StreamWriter for a file and then write each line in the string array to the file.

In this C Tutorial , we learned to write string to a text file, or lines stored in a string array to a text file. C Tutorial. C Basic Example.