using System;
using System.IO;

class TemporaryFilesAndDirectories
{
    static void Check(Exception e)
    {
        if (e != null)
        {
            throw e;
        }
    }

    static void Main()
    {
        // The easiest way to create a temporary file is by
        // using Path.GetTempFileName(). It creates a file and
        // returns its path. The file is created in the default
        // temporary folder for our OS.
        string tempFilePath = Path.GetTempFileName();
        Console.WriteLine("Temp file name: " + tempFilePath);

        // Clean up the file after we're done. The OS is
        // likely to clean up temporary files by itself after
        // some time, but it's good practice to do this
        // explicitly.
        try
        {
            // We can write some data to the file.
            File.WriteAllBytes(tempFilePath, new byte[] { 1, 2, 3, 4 });
        }
        finally
        {
            File.Delete(tempFilePath);
        }

        // If we intend to create many temporary files, we may
        // prefer to create a temporary directory.
        // Path.GetTempPath() returns the path to the temporary folder,
        // and Path.GetRandomFileName() generates a random file name.
        string tempDirPath = Path.Combine(Path.GetTempPath(), Path.GetRandomFileName());
        Directory.CreateDirectory(tempDirPath);
        Console.WriteLine("Temp dir name: " + tempDirPath);

        try
        {
            // Now we can create temporary file names by
            // combining them with our temporary directory.
            string tempFilePath2 = Path.Combine(tempDirPath, "file1");
            File.WriteAllBytes(tempFilePath2, new byte[] { 1, 2 });
        }
        finally
        {
            // Clean up the directory and all its contents
            Directory.Delete(tempDirPath, true);
        }
    }
}