Общие сведения об отражении

Отражение удобно использовать в следующих ситуациях.

• При необходимости доступа к атрибутам в метаданных программы.

• Для проверки и создания экземпляров типов в сборке.

• Для создания новых типов во время выполнения. Используйте классы в System.Reflection.Emit.

• Для выполнения позднего связывания, которое обеспечивает доступ к методам в типах, созданных во время выполнения.

C# DLLs

You can use Visual C# to create DLLs that are callable by other managed applications and by unmanaged code

How to: Create and Use C# DLLs

A dynamic linking library (DLL) is linked to your program at run time. To demonstrate building and using a DLL, consider the following scenario:

• MathLibrary.DLL: The library file that contains the methods to be called at run time. In this example, the DLL contains two methods, Add and Multiply.

• Add.cs: The source file that contains the method Add(long i, long j). It returns the sum of its parameters. The class AddClass that contains the method Add is a member of the namespace UtilityMethods.

• Mult.cs: The source code that contains the method Multiply(long x, long y). It returns the product of its parameters. The class MultiplyClass that contains the method Multiply is also a member of the namespace UtilityMethods.

• TestCode.cs: The file that contains the Main method. It uses the methods in the DLL file to calculate the sum and the product of the run-time arguments.

Example