Important keywords in C#

Some keywords in C# include:

• Sealed
• Params
• Internal
• this
• abstract

Sealed

When you use the sealed modifier to modify a method in C#, the method will lose the ability to override. The sealed method should be part of the derived class, and the method must be an overridden method.

Params

When declaring a method, if you are not sure about the number of parameters passed, you can use the params keyword. C#'s parameter array lets you know this.

Internal

The internal access modifier allows a class to expose its member variables and member functions to other functions and objects in the current assembly. Any member with the internal access modifier can be accessed from any class or method defined in the application in which the member is defined.

this

The "this" keyword in C# is used to refer to an instance of the current class. It is also used to differentiate between method parameters and class fields if they both have the same name.

abstract

The abstract keyword in C# is used for abstract classes. Abstract classes in C# include abstract methods and non-abstract methods. You cannot instantiate an abstract class.

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