Functions in C#

Functions are essential components in C# programming that define the behavior and logic of a program. They play a crucial role in creating efficient and maintainable code.

1. Signature

In C#, a function’s signature includes important information such as the parameter passing mechanism (by reference or by value), data types of parameters, and the function name. The signature acts as a blueprint defining the structure and usage of the function within the program, ensuring clear communication of function requirements.

2. Abstract Methods

Abstract methods in C# classes act as placeholders that must be implemented by derived classes. These methods do not have a method body and are implicitly marked as virtual. By using abstract methods, a base class establishes a contract that requires derived classes to provide their own concrete implementation. This approach enforces a consistent interface across different classes while allowing customization of method behavior based on specific class needs.

3. Virtual Methods

Virtual methods in C# allow a base class to offer a default implementation that can be overridden by subclasses. Subclasses can redefine the behavior of a virtual method using the override keyword. This feature promotes polymorphic behavior, enabling different classes to exhibit varied implementations of the same method. This enhances code reusability and extensibility.