public void WriteHeader(BinaryWriter writer)
{
writer.Seek(0, SeekOrigin.Begin);
writer.Write(ByteEncoder.GetBigEndian(ShapeFileConstants.HeaderStartCode));
writer.Write(new Byte[20]);
writer.Write(ByteEncoder.GetBigEndian(FileLengthInWords));
writer.Write(ByteEncoder.GetLittleEndian(ShapeFileConstants.VersionCode));
writer.Write(ByteEncoder.GetLittleEndian((Int32)ShapeType));
writer.Write(ByteEncoder.GetLittleEndian(Extents.GetMin(Ordinates.X)));
writer.Write(ByteEncoder.GetLittleEndian(Extents.GetMin(Ordinates.Y)));
writer.Write(ByteEncoder.GetLittleEndian(Extents.GetMax(Ordinates.X)));
writer.Write(ByteEncoder.GetLittleEndian(Extents.GetMax(Ordinates.Y)));
writer.Write(new Byte[32]); // Z-values and M-values
}