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OOps fundamentals

Few basics of OOP for C#

1. Overloading: points to be remembered
    A method with same name but differentiated on below:
                -Number of Parameter of method
                -Sequence of parameter of method
                -Type of parameter of method (Ex. int, string....etc)
   But does not matter is:
                -return type is not part of Method Overload

2. Abstract class: points to be remembered:
                -Can not instantiate
                -Should have access specifier (public...private can not be abstract class)
                -Class contains at least one abstract method, class must be declared as an abstract class (by putting abstract keyword before class name)
                -Can have methods with implementation (normal methods)
                -Can have methods without implementation (with abstract keyword Ex. public abstract void Method())
                

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