What do you mean by copy constructor in C#?

Question

What do you mean by copy constructor in C# ?

Nitin · Answer

A constructor that creates an object by copying variables from another object or that copies the data of one object into another object is termed as the Copy Constructor . It is a parameterized constructor that contains a parameter of the same class type. C# Copy Constructor Syntax class User { // Parameterized Constructor public User(string a, string b) { // your code } // Copy Constructor public User(User user) { // your code } } C# Copy Constructor Example using System; namespace Tutlane { class User { public string name, location; // Parameterized Constructor public User(string a, string b) { name = a; location = b; } // Copy Constructor public User(User user) { name = user.name; location = user.location; } } class Program { static void Main(string[] args) { // User object with Parameterized constructor User user = new User("Raj Kumar", "Hyderabad"); // Another User object (user1) by copying user details User user1 = new User(user); user1.name = "Goa Alavala"; user1.location = "Delhi"; Console.WriteLine(user.name + ", " + user.location); Console.WriteLine(user1.name + ", " + user1.location); Console.WriteLine("
Press Enter Key to Exit.."); Console.ReadLine(); } } } OutPut: Raj Kumar, Hyderabad Goa Alavala, Delhi Press Any key to Exit

Vishal Yelve · Answer

Copy Constructor creates an object by copying variables from another object. using System; namespace Demo { class Student { private string name; private int rank; public Student(Student s) { name = s.name; rank = s.rank; } public Student(string name, int rank) { this.name = name; this.rank = rank; } public string Display { get { return " Student " + name +" got Rank "+ rank.ToString(); } } } class StudentInfo { static void Main() { Student s1 = new Student("Jack", 2); // copy constructor Student s2 = new Student(s1); // display Console.WriteLine(s2.Display); Console.ReadLine(); } } } Above we saw, firstly we declared a copy constructor public Student(Student s) Then a new object is created for the Student class Student s1 = new Student("Jack", 2); Now, the s1 object is copied to a new object s2 Student s2 = new Student(s1); This is what we call copy constructor.

Onkar Sharma · Answer

Hi Naresh, To know more about Copy Constructor in C# , visit: https://learn.microsoft.com/en-us/dotnet/csharp/programming-guide/classes-and-structs/how-to-write-a-copy-constructor https://www.c-sharpcorner.com/UploadFile/0c1bb2/constructors-and-its-types-in-C-Sharp/ https://www.tutorialspoint.com/What-is-a-copy-constructor-in-Chash https://www.geeksforgeeks.org/c-sharp-copy-constructor/ Thanks!