How does the Using statement translate from C to VB

Question

As the question states, what can you tell me about using in the below code that I may not be familiar with?

Take this code for reference

BitmapImage bitmap = new BitmapImage();

byte[] buffer = GetHugeByteArray(); // from some external source
using (MemoryStream stream = new MemoryStream(buffer, false))
{
    bitmap.BeginInit();
    bitmap.CacheOption = BitmapCacheOption.OnLoad;
    bitmap.StreamSource = stream;
    bitmap.EndInit();
    bitmap.Freeze();
}