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Difference Between Dynamic and Object Keyword in C#

The dynamic keyword and objects don't perform compile-time type checks and identify the type of objects at runtime only and both can store any type of the variable. Objects were introduced in 1.0 C#. Later, why was Dynamic introduced in 4.0 C# when Objects already exist.

Difference 1 :

Object: the Compiler has little information about the type. It's not compiler safe.
You need to do an explicit type casting every time you want to get the value back and forth.

object  a = "Nikhil Sangani";
string a1 = a.ToString();

Dynamic: In a dynamic variable, the compiler doesn't have any information about the type of variable.

dynamic  a = "Nikhil Sangani";
string a1 = a;

Difference 2 :

Object: When using an object, you need to cast the object variable to the original type to use it and do the desired operations. In the first difference, the following example shows an error.

object  a = "Nikhil Sangani";
string a1 = a;

Now you need to do an explicit type casting every time.

Dynamic: Casting is not required but you need to know the properties and methods related to the stored type.

The Object is useful when we don't have more information about the data type. Dynamic is useful when we need to code using reflection or dynamic languages or with the COM objects and when getting a result out of the LINQ queries.
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