When creating a Hatch object, you specify the hatch pattern type, the hatch pattern name, and the associativity. Once a Hatch object has been created, you will not be able to change the hatch associativity.
创建 Hatch 对象时，需要指定填充图案类型、填充图案名和关联性。一旦创建 Hatch 对象，就无法再更改其关联性。
To create a Hatch object, you create a new instance of the object and then use the AppendEntity method to add it to a BlockTableRecord object.
要创建 Hatch 对象，请创建一个新的对象实例，然后使用 AppendEntity 方法将其添加到块表记录对象中去。
