Difference Between Var and Dynamic in C#

Var is a used as a variable in C#.It is Compile time variable and the type of variable is decided at Compile time. It is introduced in C#3.0 and no need to specify the datatype for variable ,it is implicitly converted into the desired datatype. It is required variable initialization if it is not initialized then compiler will throw an exception.Since it is Compile time so it supports the intellisense.We can not use Var as a return value from any Method and we can not pass Var as a parameter in Method Call.

Dynamic is a used as a variable in C#.It is Run time variable and the type of variable is decided at Runtime. It is introduced in C#4.0 and no need to specify the datatype for variable ,it is implicitly converted into the desired datatype. It is does not required any variable initialization if it is not initialized then compiler will not throw an exception.Since it is Runtime so it does supports the intellisense.We can use Dynamic as a return value from any Method and we can pass Dynamic as a parameter in Method Call.

Below is the Tabular Representation of the Differences in Var and Dynamic.

Sr.No	Var	Dynamic
1	It uses Var Keyword	It Uses Dynamic Keyword
2	It uses Compile Time Error Checking	It uses Runtime Error Checking
3	It was introduced in C# 3.0	It was introduced in C# 4.0
4	It required Variable Initialization before use	It is not required Initialization of Variable
5	It supports Intellisense	It does not support Intellisense
6	It does not used as a Return Type in Method	Can used as a Return Type in Method
7	Can not pass as a Parameter in Method Call	Can pass as a Parameter in Method Call
8	It provides implicitly type conversion	Dynamic is not required the type converstion