Dynamic Type In C#

In this article, I will discuss Dynamic Type in C#,

Dynamic Type

'Dynamic' keyword is used to declare the variable of the dynamic type. Dynamic data type variable can contain any type of value. Type of value contained is checked at runtime. The syntax of Dynamic type is shown below:

Dynamic <VariableName> = value;

'Dynamic' keyword is similar to 'var' keyword or you can think it as a replacement for var keyword. Unlike 'var', it is not necessary to initialize dynamic variable while declaring. Dynamic types are used in many cases as shown below:

Multiple declarations of a variable with different data types

With dynamic, we can have multiple initializations of a variable of different data types. Like a variable named 'sample' can contain int, float, bool, string etc. values in a class as shown below in the example:

using System;
namespace Tutpoint
{
class Program
{
static void Main(string[] args)
{
Console.WriteLine("hello Tutpoint");
dynamic sample;
sample = 12;
Console.WriteLine(sample);
sample = 0.222;
Console.WriteLine(sample);
sample = true;
Console.WriteLine(sample);
sample = "Dynamic";
Console.WriteLine(sample);
sample = null;
Console.ReadLine();
}
}
}

An output of the program will be:

hello Tutpoint
12
0.222
True
Dynamic

Dynamic return type and/or a dynamic parameter

This is the most important and awesome feature of dynamic. With this, a method can return value of different data type as shown in the example.

using System;
namespace Tutpoint
{
class Program
{
static void Main(string[] args)
{
Console.WriteLine("hello Tutpoint");
dynamic sample;
sample = 12;
Console.WriteLine(sample);
sample = 0.222;
Console.WriteLine(sample);
sample = true;
Console.WriteLine(sample);
sample = "Dynamic";
Console.WriteLine(sample);
sample = null;
Console.ReadLine();
}
public dynamic TutLovers(dynamic dynm)
{
if (dynm == 100)
return 100;
else if (dynm == "Dynamic")
return "Dynamic";
else if (dynm == 12)
return 12;
else
return false;
}
}
}

3 Comments

Join the conversation! Your thoughts help the community grow.

Dadash Aliyev4y ago
Super blog
Sandy9y ago
There is any advantage of Dynamic Type or is it any impact on performance?
- Shubham Jain9y ago
  Go through this link https://stackoverflow.com/questions/4646786/dynamic-lang-runtime-vs-reflection