Types of Constructors in C#
Constructors in C# are special methods within a class that are responsible for initializing the object's state when an instance of the class is created. They have the same name as the class and can have various forms and access modifiers.
There are two types of constructors in C#: default constructors and parameterized constructors.
A default constructor is automatically provided by the C# compiler if you don't define any constructors in your class. It initializes the object with default values (e.g., numeric types with 0, reference types with null).
A parameterized constructor allows you to initialize an object with specific values provided as arguments when the object is created.
Example of creating an instance with a parameterized constructor:
You can define multiple constructors in a class with different parameter lists, a technique called constructor overloading.
This allows you to create objects using different sets of parameters:
A static constructor is used to initialize static members of a class. It's called automatically before any static members are accessed or any static methods are called, and it cannot have parameters.
The static constructor runs once when the class is first used:
A private constructor prevents the class from being instantiated directly from outside the class. It's often used in singleton patterns or to create utility classes with only static members.
In this example, you can't create a Singleton object directly; you must use the Instance property.
Constructors in C# are special methods within classes used for initializing objects when they are created. They can be default constructors provided by the compiler, parameterized constructors that accept arguments for custom initialization, or static constructors for initializing static members. Constructor overloading allows multiple constructors with different parameter lists, and private constructors can restrict direct instantiation of a class, making them essential for managing object initialization and behavior in C# programs.