.NET Framework Standard Library Annotated Reference, Volume 1: Base Class Library and Extended Numerics Library

Example

using System;
using System.IO;
using System.Text;

namespace Samples
{
  public class TextReaderSample
  {
    public static void Main()
    {
      string s = "textreader.txt";
      using(TextReader tr = new StreamReader(s))
      {
        Console.WriteLine(tr.ReadLine());
        Console.WriteLine((Char)tr.Peek());
        char[] chars = new Char[4];
        tr.Read(chars, 0, chars.Length);
        foreach(char c in chars)
          Console.Write(c);
        Console.WriteLine(tr.ReadToEnd());
      }
    }
  }
}

The output is

Hello world!
G
Goodbye world!