How does an interface differ from a class?

What modifier to add instead of '....' to become a true code? public class ClassA { .... int x = 10; } public class Program : ClassA { static void Main(string[] args) { ClassA ob = new ClassA(); Program cc = new Program(); cc.x = 12; ob.x = 19; } }

What is the difference between Convert.ToString() and ToString()?

What is boxing in .Net?

What will be the output of the following code: Console.WriteLine(('?' ?? '???') == '?' ? '??' : '???');

Choose the correct answer for: (1) var _Results = from item in _List where item.Value == 1 select item; (2) var _Results = _List.Where(x => x.Value == 1);

If i == 0, why is (i += i++) == 0 in C#?

Which of the following is the correct statement to combine two URL(s)?

Which is the following is the correct way to convert a Byte Array to a Hexadecimal string, and vice versa?

Can a function be overload with the same number and types of arguments (parameters), but with a different return type?

Which of the following can be used to expose a method as a filed to the outside world?