How to create shared library in .NET core?

[AjayGohil]

How to create shared library in .NET core?

[natashasturrock]

Creating a shared library in .NET Core (now just .NET, from .NET 5 onward) is straightforward using a Class Library project. Here's how to do it:

Steps to Create a Shared Library in .NET Core
Create the class library project:

[HTML]bash
dotnet new classlib -n MySharedLibrary
This creates a .csproj and a basic Class1.cs.[/HTML]

Write your shared code:
Replace or add classes, interfaces, helpers, etc., inside the library project. Example:

[HTML]csharp
namespace MySharedLibrary
{
public class MathUtils
{
public static int Add(int a, int b) => a + b;
}
}[/HTML]

Reference the shared library from another project:
If you're using another .NET Core app or API, go to its directory and add a reference:

[HTML]bash
dotnet add reference ../MySharedLibrary/MySharedLibrary .csproj[/HTML]

Use it in your main project:

[HTML]csharp
using MySharedLibrary ;

var result = MathUtils.Add(2 , 3);[/HTML]
(Optional) Package as a NuGet package:
If you want to reuse it across solutions:

[HTML]bash
dotnet pack -c Release[/HTML]
Then publish to a local or public NuGet feed.

Structure Example

[HTML]markdown
/MySolution
/MySharedLibrary
MySharedLibrary .csproj
/MyApp
MyApp.csproj zz0.ovte40c14fz z[/HTML]

[natashasturrock]

To create a shared library in .NET Core, you simply create a Class Library project. This library can contain reusable code like helper methods, services, or business logic. Once built, you can reference it from other .NET Core projects within the same solution or even package it as a NuGet package for wider reuse. It's a great way to keep your code modular and maintainable.