The File.AppendAllText() method takes the file path and the text to be written as its arguments. If the file does not exist, the File.AppendAllText() method creates a new empty file and writes the data in it. The File.AppendAllText() method in C# is used to open an existing file, append all the text to the end of the file and then close the file. Append to a Text File With the File.AppendAllText() Method in C This tutorial will discuss the methods to append to a text file in C#.
