Difference between var and dynamic in C#

var

• Introduced in C# 3.0
• At compile time, the compiler decide the type of variable which is declared. 
• Need to initialize at the time of deceleration.
• Visual Studio shows intellisense as the type of variable assigned is known to the compiler.
• We cannot assign two data type in one variable since the compiler has already assign the data type to the value. 

     that is :

       
var obj1=1;
obj1="hello";

   will through an error.


dynamic

• Introduced in C# 3.0
• At runtime time, the compiler decide the type of variable which is declared. 
• No need to initialize at the time of deceleration.
• Visual Studio intellisense is not available since the type of variable assigned is unknown to the compiler, which will be known only at the run time.
• We can assign two data type in one variable since the compiler recreate the type when another data type is assigned to the variable.