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.NET EXE and DLL Explained

In .NET development, EXE and DLL files are very important. They help in building applications and reusable components.

What is EXE?

EXE (Executable File) is a program that you can run directly. It contains the main entry point of the application.

• Runs directly
• Contains Main() method
• Used for applications

// C# EXE Example
using System;

class Program
{
    static void Main()
    {
        Console.WriteLine("Hello from EXE");
    }
}

What is DLL?

DLL (Dynamic Link Library) is a reusable library. It cannot run directly but is used by other programs.

• Reusable code
• No Main() method required
• Used in multiple applications

// C# DLL Example
public class MathHelper
{
    public int Add(int a, int b)
    {
        return a + b;
    }
}

How to Use DLL in EXE

// Using DLL in EXE
MathHelper obj = new MathHelper();
Console.WriteLine(obj.Add(5, 3));

Difference Between EXE and DLL

• EXE can run, DLL cannot
• EXE is main program, DLL is support library
• DLL promotes code reuse

Conclusion

Use EXE for running applications and DLL for reusable logic. Both are essential in .NET development.

Created by Koustubh | Liwansh Software Solutions

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