- Generics allow us to have type or method which can operate on objects of various types, while providing type safety at the compile time.
- That means if you define generics class object of type Integer & you are trying to add different type of variable to generic class like String then it will give compile time error.
- In another sense, if we try to add different types in same list like string and int in a same list then compile time error will be thrown.
- Generics are available under the namespace System.Collections.Generic.
- The concept of type parameters is introduce to the .NET Framework with the help of Generics, which makes it possible to design classes & methods which defer the specification of one or more types until that class or method is declared and instantiated by the client code.
public class MyGenericClass
{
void Add(T val) { }
}
//Define a class which will consume MyGenericClass
class MyGenericClass
{
static void Main()
{
// Declare a generic list having int as type
MyGenericClass myGenericClassObj1 = new MyGenericClass();
// Declare a generic list of having string as type
MyGenericClass myGenericClassObj2 = new MyGenericClass();
}
}
Advantages:
- Generics provide feature of Type Safety & it's performance is faster.
- Generics can be used to create your own class of collection.
- Using generic we can create your own generic methods, interfaces, classes, delegates and events.
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