C# 1001 notes

2022-02-22 16:20:00 Is there a way to catch multiple exceptions at once and without code duplication?

Consider this code.

Is there a way to catch both exceptions and only call the WebId = Guid.Empty call once?

The answer will be post soon. Открыть/Комментировать

2022-02-15 18:20:00 ​​ What is sealed Class in C#?

When applied to a class, the sealed modifier prevents other classes from inheriting from it. In the following example, class B inherits from class A, but no class can inherit from class B.

You can also use the sealed modifier on a method or property that overrides a virtual method or property in a base class. This enables you to allow classes to derive from your class and prevent them from overriding specific virtual methods or properties.

Summary:

Once a class is defined as a sealed class, the class cannot be inherited.

Structs are also sealed. Открыть/Комментировать

2022-02-08 18:20:00 What is Extension Method in C# and how to use them?

Extension methods allow you to add methods to existing types without creating a new derived type, recompiling, or otherwise modifying the original type. An extension method is a special kind of static method, but they are called as if they were instance methods on the extended type. Открыть/Комментировать

2022-02-03 18:30:05 What is deep or shallow copy concept in C#?

Shallow Copy is about copying an object's value type fields into the target object and the object's reference types are copied as references into the target object but not the referenced object itself. It copies the types bit by bit. The result is that both instances are cloned and the original will refer to the same object.

Deep Copy is used to make a complete deep copy of the internal reference types, for this we need to configure the object returned by MemberwiseClone().

In other words a deep copy occurs when an object is copied along with the objects to which it refers.

#post Открыть/Комментировать

2022-02-02 19:50:23 I've noticed there were only 7% of correct answers ( ) on the last tricky question (I was also confused )

Let me explain why it happens.

C# specification: https://www.ecma-international.org/wp-content/uploads/ECMA-334_5th_edition_december_2017.pdf Открыть/Комментировать

2022-02-01 18:20:00 Открыть/Комментировать

2022-02-01 18:20:00 Открыть/Комментировать

2022-01-31 12:30:00 What is scope of a Internal member variable of a C# class?

Internal access specifier allows a class to expose its member variables and member functions to other functions and objects in the current assembly. In other words, any member with internal access specifier can be accessed from any class or method defined within the application in which the member is defined.

You can use it for utility or helper classes/methods that you would like to access from many other classes within the same assembly, but that you want to ensure code in other assemblies can't access. Открыть/Комментировать

2022-01-25 18:20:00 Открыть/Комментировать

2022-01-25 18:20:00 Открыть/Комментировать