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How do you call the multiple constructors of a class with single object creation?What is constructor chaining in C#?Can a constructor be called directly from a method?What is constructor overloading and how it’s different than method overloading?What is the difference between constructor overloading and method overloading?Is it possible to overload copy constructor in C#?Can we overload static constructors in C#?Can we overload private constructors in C#?Can we give return type of the constructor in C#?What is the destructor and when it’s called?Is it possible to call constructor and destructor explicitly?What is the Structure and why we need it although we have a class?What are the similarities between Class and Structure?What is the difference between Class and Structure?What is copy structure?What is nested structure?Is it always necessary to create an object of the class?How many different ways to create an object of the class?What are the pros and cons of creating object by new() keyword?What are the pros and cons of delegate object creation to DI container?What are the pros and cons of creating an object by reflection?What are the pros and cons of getting an object from an object pool?What are the pros and cons of creating an object by deserialization?Is it possible to create an object without a class in C#?What is constant?What is static modifier? 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A is the base class and B is the child class, If we create an instance of child class then which class’s constructor called first?Does a derived class can inherit the constructors of its base class?What should we do that if we create an object of child class then the parameterized constructor of base class must be invoked?As we know that base constructor invoked first when we create instance of child class but if we create an instance of child class by parameterized constructor and base class has both default and parameterized constructor then which constructor of the base will be invoked?Can you assign an object of derived class to the variable of base class and if both have the same method name then which will be invoked?Can we create instance of base class and store it to derive class?Can we create derive class object inside base class, and if create instance of child class then what will happen?Can we inherit child class from 2 base classes? if yes then how? If not then why?Does C# support Multiple Inheritance?Why multiple inheritance is not supported in C# and why it’s supported in C++?How is multiple inheritance achieved in C#?What are Access Modifiers? Explain private, public, protected, internal, protected internal access modifiersWhat are the default access modifiers of the class?Why classes cannot be declared as protected?Can we declare private class in namespace?What are the valid access specifier used for the declaration of class at namespace level? If we inherit a class, do the private variables also get inherited?Can you prevent your class from being inherited?Can you prevent your class from being inherited without using sealed keyword?What is abstraction?What is encapsulation?What is the difference between abstraction and encapsulation?What is polymorphism?What is static or compile time polymorphism?What is runtime polymorphism or late binding or dynamic binding?What is method overloading?When and why we should use overload methods?What is inheritance based overloading?What are the advantages of using overloading?Can we overload the method in the same class?What is the execution control flow in overloaded methods?What is method overriding?What s virtual keyword?What are the key points to make the method as overridden?When it is must to override the method?When a derived class can overrides the base class member?Can we declare fields inside the class as virtual?When we treat sub-class method as an overriding method?Can we override private virtual method in c#?Can we override method in the same class?Can we execute parent class method if it is overridden in the child class?If we have virtual in base class and the same method is overridden in child class, by creating instance of child class and assign it to base class, then which of the method will be invoked first.What is the difference between method overloading and method overriding?What is method hiding?Can you access a hidden method in the derived which is declared in the base class?What is the difference between method overriding and method hiding?You have a component with 2 parameters and deployed to client side, now you have changed your method with 3 parameters, how can you deploy this without affecting the client code?What is operator overloading?What is abstract class and why we need of it?What are the rules of abstract classes?What is an abstract method?What is concrete method?When do you use abstract class in C#?When to use the abstract method in C#?
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What is copy structure?

In C#, a "copy structure" usually refers to creating a copy of a structure object. When you have a structure (also known as a value type), you can duplicate its values and create a new, independent copy of the data.

Unlike reference types (e.g., classes), where assigning one variable to another merely creates a reference to the same object, copying a structure creates a distinct copy of the data, and changes made to one copy will not affect the other.

Here's an example of copying a structure in C#: 


struct StudentRecord
{
   public string Id;
   public string FirstName;
   public string LastName;
   public int ClassGrade;
}
class Program
{
   static void Main()
   {
      StudentRecord std1 = new StudentRecord();
      std1.Id = "1";
      std1.FirstName = "john";
      std1.LastName = "smith";
      std1.ClassGrade = 10;

      StudentRecord std2 = std1; //copies std1 into std2

      // Modifying std2 will not affect std1, as they are independent copies
      std2.Id = "2";
      std2.FirstName = "stuart";
      std2.LastName = "broad";
      std2.ClassGrade = 9;

      Console.WriteLine("Display all field values std1");
      Console.WriteLine($"Id: {std1.Id}");
      Console.WriteLine($"Firt Name: {std1.FirstName}");
      Console.WriteLine($"Last Name: {std1.LastName}");
      Console.WriteLine($"Class Grade: {std1.ClassGrade}");

      Console.WriteLine("Display all field values std2");
      Console.WriteLine($"Id: {std2.Id}");
      Console.WriteLine($"Firt Name: {std2.FirstName}");
      Console.WriteLine($"Last Name: {std2.LastName}");
      Console.WriteLine($"Class Grade: {std2.ClassGrade}");
   }
}

In this example, we have a 'StudentRecord' structure with 4 fields ('Id', 'FirstName', 'LastName, 'ClassGrade'). We create an instance std1 and then create a copy std2 by assigning std1 to it. After modifying 'std2.Id', 'std2.FirstName', 'std2.LastName', 'std2.ClassGrade' we observe that all properties of 'std1' remains unchanged, showing that they are independent copies of the data.

Output of the above program is: 


Display all field values std1
Id: 1
Firt Name: john
Last Name: smith
Class Grade: 10

Display all field values std2
Id: 2
Firt Name: stuart
Last Name: broad
Class Grade: 9

Copying structures is often useful when you want to pass data between methods or store snapshots of data in different variables without altering the original data.

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