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copied!<p>here's one example of simulating virtual memory on C#</p> <p>source: <a href="http://msdn.microsoft.com/en-us/library/aa288465(VS.71).aspx" rel="nofollow noreferrer">http://msdn.microsoft.com/en-us/library/aa288465(VS.71).aspx</a></p> <pre><code>// indexer.cs // arguments: indexer.txt using System; using System.IO; // Class to provide access to a large file // as if it were a byte array. public class FileByteArray { Stream stream; // Holds the underlying stream // used to access the file. // Create a new FileByteArray encapsulating a particular file. public FileByteArray(string fileName) { stream = new FileStream(fileName, FileMode.Open); } // Close the stream. This should be the last thing done // when you are finished. public void Close() { stream.Close(); stream = null; } // Indexer to provide read/write access to the file. public byte this[long index] // long is a 64-bit integer { // Read one byte at offset index and return it. get { byte[] buffer = new byte[1]; stream.Seek(index, SeekOrigin.Begin); stream.Read(buffer, 0, 1); return buffer[0]; } // Write one byte at offset index and return it. set { byte[] buffer = new byte[1] {value}; stream.Seek(index, SeekOrigin.Begin); stream.Write(buffer, 0, 1); } } // Get the total length of the file. public long Length { get { return stream.Seek(0, SeekOrigin.End); } } } // Demonstrate the FileByteArray class. // Reverses the bytes in a file. public class Reverse { public static void Main(String[] args) { // Check for arguments. if (args.Length == 0) { Console.WriteLine("indexer <filename>"); return; } FileByteArray file = new FileByteArray(args[0]); long len = file.Length; // Swap bytes in the file to reverse it. for (long i = 0; i < len / 2; ++i) { byte t; // Note that indexing the "file" variable invokes the // indexer on the FileByteStream class, which reads // and writes the bytes in the file. t = file[i]; file[i] = file[len - i - 1]; file[len - i - 1] = t; } file.Close(); } } </code></pre> <p>Use the above code to roll your own array class. Then just use any array sorting algorithms.</p>

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