Similar to generic interfaces, we can also define generic classes. We define classes with a generic type in angle brackets (<>), as shown:

class GenericClass<T> { 
    add: (a: T, b: T) => T; 
}  
var myGenericClass = new GenericClass<number>(); 
myGenericClass.add = function(a, b) { return a + b; }; 

Here, the generic class is instantiated by passing the generic data type as number. So, the add function will process and add two numbers passed as parameters.