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

Example

using System;
using System.IO;
namespace Samples
{
  public class FileSample
  {
    public static void Main()
    {
      string s = @"File.txt";
      if(File.Exists(s))
      {
        Console.WriteLine("File {0} already exists", s);
        File.Delete(s);
      }
      using(StreamWriter sw = File.CreateText(s))
      {
        Console.WriteLine("Can read: {0}",
                          sw.BaseStream.CanRead);
        Console.WriteLine("Can write: {0}",
                          sw.BaseStream.CanWrite);
        sw.WriteLine(DateTime.Now);
      }
    }
  }
}

The output is

File File.txt already exists
Can read: False
Can write: True