在转换方法、属性和栏位的处理中，会发生各种不同的资料型别转换。
In the process of converting methods, properties, and fields, various data type conversions take place.
将指定的资料储存到这个资料物件中，自动从来源物件型别转换资料格式。
Stores the specified data in this data object, automatically converting the data format from the source object type.
在以下范例中，资料型别从衍生类别转换为其基底类别，但转换后两变数所指向的物件并未变更。
In the following example, the data type is converted from the derived class to its base class, but the object that both variables now point to is unchanged.
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