using System.IO.MemoryMappedFiles; public class Example { public static void Main() { using (var mmf = MemoryMappedFile.CreateNew("example", 10000)) { // Use the memory mapped file here } // The MemoryMappedFile object is automatically closed when the using block is exited } }In this example, a new MemoryMappedFile object is created with a name "example" and capacity of 10000 bytes. The object is used inside the using block, and it is automatically closed when the using block is exited due to the IDisposable interface implementation. The package library for this example is the System.IO.MemoryMappedFiles package which is included in the .NET framework.