Should You Inherit from List?

The disadvantages of inheritance

List<T> Although inherited seemingly simple, there are some problems in doing so:

In terms of performance List<T>

After a lot of optimization to improve the speed. Inheritance will destroy these optimizations, which may lead to decline in performance. Control restrictions

List<T> is a class provided by Microsoft, you cannot directly control it. If the bottom layer of implements unexpected changes, it may lead to future compatibility issues.

Internal exposure

Inheritance from may inadvertently expose its internal implementation. This will depend on the details of changes that may occur in the future version, which will lead to potential maintenance problems.

List<T> alternative List<T>

Use Class

List<T>

provided less practical methods, but it provides greater flexibility and control of collection behavior.

encapsulation

• Collection<T> Packaged in a custom class can provide logical separation between the list and its additional attributes. However, this will increase code redundancy and may need to forward methods for indexes and set operations.

Design customized data structure Collection<T>

• For complex data structures with unique needs, it is best to create a custom data structure from scratch. This method can fully control the implementation, so that optimized algorithms and customized functions are allowed. List<T> Decision factors

Whether the decision inherited from should be based on the following:

List<T>

The nature of the data structure

: Is it a simple list, or do you need additional attributes and behaviors?
• Performance requirements : Data structure requires a high degree of optimization?

Control and maintainability

: Do you need to control the implementation and ensure future compatibility?

The complexity of the required function : Is the required function complicated enough to customize the data structure?

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