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This article mainly explains "how to understand C# forced type conversion and generics". Interested friends may wish to take a look. The method introduced in this paper is simple, fast and practical. Let's let the editor take you to learn "how to understand C# forced type conversions and generics".

C # cast is the same as normal objects, objects of generic classes can be converted to other generic types by casting, but only if the two are compatible in all respects. The C # compiler only allows general type parameters to be implicitly cast to the type specified by Object or constraints, as shown in the following code block. Such an implicit cast is type-safe because any incompatibility can be found at compile time.

Demonstration of C# forced type conversion and C# generic examples:

Code block

Implicit cast of general type parameters

Interface ISomeInterface {...} class BaseClass {...} class MyClass where T: BaseClass,ISomeInterface {void SomeMethod (T t) {ISomeInterface obj1 = t; BaseClass obj2 = t; object obj3 = t;}}

The compiler allows you to explicitly cast a generic type parameter to any other interface, but not to a class:

Interface ISomeInterface {...} class SomeClass {...} class MyClass {void SomeMethod (T t) {ISomeInterface obj1 = (ISomeInterface) t Tracer SomeClass obj2 = (SomeClass) t Tracer / Does not compile}

However, you can use the temporary Object variable to cast generic type parameters to any other type:

Class SomeClass {...} class MyClass {void SomeMethod (T t) {object temp = t; SomeClass obj = (SomeClass) temp;}}

Needless to say, such explicit casting is dangerous because an exception may be thrown at run time if the type arguments used to replace generic type parameters are not derived from the type you want to explicitly cast to. A better way to avoid the risk of throwing a cast exception is to use the is and as operators, as shown in block 6. If the type of the generic type parameter is the type being queried, the is operator returns true;. If these types are compatible, as performs a cast, otherwise it returns null. You can use is and as for generic type parameters and generic classes with specific type arguments.

C# forced type conversion and C# generic instances:

Code block

Use the "is" and "as" operators for general type parameters

Public class MyClass {public void SomeMethod (T t) {if (t is int) {} if (t is LinkedList) {...} string str = t as string; if (str! = null) {...} LinkedList list = t as LinkedList If (list! = null) {.}} at this point, I believe you have a deeper understanding of "C# forced type conversion and generics". You might as well do it in practice! Here is the website, more related content can enter the relevant channels to inquire, follow us, continue to learn!

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