How to create an object of a class at runtime C#

Question

For example, I want to create a program that records the book title, author, genre, etc., each book is a separate class object, how can I make it so that I can automatically declare new class objects during the program's operation (I need this for educational purposes)

• cemahseri: You can use anonymous types.

Answer 1

You can use the Activator.CreateInstance method to create a new instance of a given type. This example demonstrates the usage.

class MyType
{
 public override string ToString()
 {
 return "My type.";
 }
}
MyType obj = Activator.CreateInstance<MyType>();
Console.WriteLine(obj);

If you have a type that has constructor parameters, these can be given in the following way:

class MyTypeWithConstructor
{
 string _message;
 public MyTypeWithConstructor(string message)
 {
 _message = message;
 }
 public override string ToString()
 {
 return _message;
 }
}
object[] parameters = new object[1] { "Hello world!" };
MyTypeWithConstructor obj2 = (MyTypeWithConstructor)Activator.CreateInstance(
 typeof(MyTypeWithConstructor), args: parameters);
Console.WriteLine(obj2);