Polymorphism/Overloading Real Application Use in C# .NET

Q. What is Polymorphism and what are its types? When to use polymorphism?
Q. What is Method Overloading? In how many ways a method can be overloaded?
Q. When should you use method overloading in real applications?
Q. If two methods are same except return type, then methods are overloaded or what will happen?