We are going to see how the Dynamics work in .Net now. For example consider the following statement.

dynamic d=GetSomeData(15); When we execute this statement,Let's see what will happen behind the scenes.

When the above statement executes, the DLR will pass the expression trees to the target object.If the dynamic data type is pointing in memory to a COM object, then the expression tree will be sent to the COM interface named IDispatch. This interface is COM's way of incorporating its own set of dynamic services.

If the dynamic data is not pointing to a COM object, then the expression tree may be passed to the object implementing the IDynamicObject interface.This interface is used to map the expression tree to Ruby specifics in the dynamic languages like Iron Ruby.

If suppose the dynamic data is not pointing to COM object and does not implement IDynamicObject, then the object will be considered as .Net object. In this case the expression tree is sent to the C# run time binder for processing.

After the expression tree has been processed by the given binder, the dynamic data will be resolved to the real in-memory data type after which the correct method is called with any necessary parameters.

To know more about the expression tree basics , please read the following article.

http://www.codeproject.com/Articles/235860/Expression-Tree-Basics

Check this blog for more info about var and dynamic:-

senthilvijayalakshmi.blogspot.in/2013/03/difference-between-var-and-dynamic.html

The Var(Implicit typed local variable) keyword is used to define local variables.In case of Var , the underlying data type is determined at compile time itself based on the initial assignment.Once the initial assignment has been made with Var type , then it will become strongly typed.If you try to store any incompatible value with the Var type it will result in compile time error.

But in Dynamic type, the underlying type is determined only at run time.Dynamic data type is not checked at compile time and also it is not strongly typed.We can assign any initial value for dynamic type and then it can be reassigned to any new value during its life time.

Example:
dynamic test="Senthil";
Console.Writeline(test.GetType()) // System.String

test=1222;
Console.Writeline(test.GetType()) // System.Int32

test=new List<string>();
Console.Writeline(test.GetType()) //System.Collections.Generic.List'1[System.String]

It doesn't provide IntelliSense support also.It doesn't give better support when we give work with linq also.Because it doesn't support lambda expressions ,extension methods and anonymous methods.


Check this blog for more info about var and dynamic:-


senthilvijayalakshmi.blogspot.in/2013/03/difference-between-var-and-dynamic.html

Deletes it from the memory.

An MSI installer, a CAB archive, and XCOPY command.

The new modifier hides a member of the base class. C# supports only hide by signature.

It is possible to declare a method as Static provided that they don't attempt to access any instance data or other instance methods.

Yes, using the params keyword.

No

Both are meant for constant values. A const field can only be initialized at the declaration of the field. A readonly field can be initialized either at the declaration or.

No, private methods are not accessible outside the class.