C# Command Line Argument

We all know, that we can pass parameter to a function as argument but what about Main(string[] args) method? Do parameters can be passed to Main() method in C#? Yes, parameter(s) can be passed to a Main() method in C# and it is called command line argument.
Main() method is where program stars execution. Main method doesn’t accept parameter from any method. It accept parameter through command line. It is an array type parameter that can accept n number of parameter in runtime
.

In Main(string[] args) , args is a string type of array that can hold numerous parameter.

C# command line argument example:

To understand command line argument in C#, consider the following command line example.

---

1.Open Notepad and write the following code and save it with command.cs

using System;

namespace command
{
  class Program
   {
     static void Main(string[] args)
      {
        Console.WriteLine("First Name is " + args[0]);
        Console.WriteLine("Last Name is " + args[1]);
        Console.ReadLine();
      }
   }
}

2. Open visual studio command prompt and compile the code as follow:
(i) Set current path, where your program is saved.
(ii) Compile it with csc command.cs
3. Now execute the program using following command line argument:
(a) command steven clark

---

Output

---

D:\>command Aav Kumar
First Name is Aav 
Last Name is Kumar




In the preceding example, we passed two parameters Aav Kumar as command line argument to the main method. In runtime, Main() method accepted both parameters and holds it to the args variable that is string type array. Then both values are accessed with the index position of array.