TextWriter creates text output. This C# class is used to implement other file classes in the base class library. You can also use it to implement file IO logic.

TextReader

Used by StreamWriter. TextWriter is used to implement StreamWriter. It lacks helpful features, but is still useful when we want to use a specific text encoding.

StreamWriter

Example. First here we look at the TextWriter class, which we instantiate from the result of the File.CreateText static method in the System.IO namespace.

File

using

Environment.NewLine

using System.IO;

class Program
{
    static void Main()
    {
        //
        // Create a new TextWriter in the resource acquisition statement.
        //
        using (TextWriter writer = File.CreateText("C:\\perl.txt"))
        {
            //
            // Write one line.
            //
            writer.WriteLine("First line");
            //
            // Write two strings.
            //
            writer.Write("A ");
            writer.Write("B ");
            //
            // Write the default newline.
            //
            writer.Write(writer.NewLine);
        }
    }
}
First line
A B

StreamWriter. The StreamWriter class inherits from TextWriter. The TextWriter class is an abstract base class, which means it provides functionality for StreamWriter.

Summary. We looked at the TextWriter class and related it to the StreamWriter class by noting that it is used as a base class. TextWriter does not handle encodings automatically.