public void Serialize(Vertex2D vert)
{
writer.Write(vert.X);
writer.Write(vert.Y);
}
public void Serialize(Vertex2D vert)
{
NumberFormatInfo format = new NumberFormatInfo();
format.NumberDecimalSeparator = ".";
format.NumberGroupSeparator = ",";
writer.WriteElementString("x", vert.X.ToString("f4", format));
writer.WriteElementString("y", vert.Y.ToString("f4", format));
}