[c#] convertire da little endian a big endian

[file001]

io ho provato così:

BinaryReader br = new BinaryReader(File.Open("prova.bin", FileMode.Open, FileAccess.Read));
br.BaseStream.Position = 0x0000A2;
int Byte = BitConverter.ToInt16(br.ReadBytes(4), 0);
listBox1.Items.Add(Byte);