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Interface is similar to a class, and we implement interface by defining their method in class. Suppose we have same method in more than one interface.

In this case there will be a question for interview.

Q.    Can we implement interface with same method name?
Ans. Yes by using explicit interface implementation.

Lets see below example:

class Program
    {
        static void Main(string[] args)
        {
            MyInterface1 obj1 = new MyClass();
            MyInterface2 obj2 = new MyClass();

            obj1.func1();
            obj2.func1();
        }
        interface MyInterface1
        {
            void func1();
        }

        interface MyInterface2
        {
            void func1();
        }

        class MyClass : MyInterface1, MyInterface2
        {
            void  MyInterface1.func1()
            {
                Console.WriteLine("Hello1");
            }

            void MyInterface2.func1()
            {
                Console.WriteLine("Hello2");
            }
      …

In SharePoint Environment a developer can add ASPX file very easily. An ASPX file contains code which may affect the SharePoint environment. In simple words, there might be a security risk of security injection.