using Windows.Storage.Streams; // Create a buffer var buffer = new Windows.Storage.Streams.Buffer(4); // Create a DataWriter object for the buffer var dataWriter = new DataWriter(buffer); // Write an integer to the buffer dataWriter.WriteInt32(42); // Flush the DataWriter to save changes to the buffer await dataWriter.FlushAsync(); // Convert the buffer to a byte array var byteArray = buffer.ToArray();In this example, we create a buffer with a length of 4 bytes and create a DataWriter object to write to the buffer. We then write the integer value of 42 using the WriteInt32 method and flush the DataWriter to save the changes to the buffer. Finally, we convert the buffer to a byte array using the ToArray() method. Package library: Windows.winmd.