C # uses the StreamReader class and the StreamWriter class to implement file read and write operations

Read and write operations on the file should be the most important file operations, System.IO namespace for us to provide a number of file read and write operation classes, here I want to introduce the most common is the most basic StreamReader class and StreamWriter class. From the names of these two classes, it is not difficult to find that they are both stream-based read and write operations classes.

We can get a StreamReader object through the OpenText () method of the file class, through which we can implement the read operation of the text file, by the following method:

Console.WriteLine ("Reading the contents from the file");
StreamReader s = File.OpenText ("MyText.txt");
string read = null;
while ((read = S.readline ()) = null)
{
Console.WriteLine (read);
}
S.close ();
By calling the CreateText () method of the FileInfo class we can get a StreamWriter object, call WriteLine () of the StreamWriter class and we can write the data to the text file as follows:

FileInfo f = new FileInfo ("MyText.txt")
StreamWriter w = f.createtext ();
W.writeline ("This was from");
W.writeline ("Chapter 1");
W.writeline ("of C # Module");
W.write (W.newline);
W.writeline ("Thanks for your Time");
W.close ();

C # uses the StreamReader class and the StreamWriter class to implement file read and write operations