Creating Razor Class Library (RCL) using Syncfusion Blazor components

7 Sep 20235 minutes to read

This section provides information about creating Razor Class Library with the Syncfusion Blazor components using Visual Studio.



.NET 6 and .NET 7 requires Visual Studio 2022 or later.

Create a Razor Class Library using Syncfusion Blazor components in Visual Studio 2022

  1. Choose Create a new project from the Visual Studio dashboard.

    new project in aspnetcore blazor

  2. Select Razor Class Library from the template, and then click the Next button.

    razor class template

  3. Now, the project configuration window will popup. Click Create button to create a new project with the default project configuration.

    razor class project configuration

  4. Select the target Framework .NET 6 at the top of the Application based on your required target that you want and then click the Create button to create a new Razor Class Library application.

    select framework

Importing Syncfusion Blazor component in Razor Class Library

To add Blazor Calendar component in the app, open the NuGet package manager in Visual Studio (Tools → NuGet Package Manager → Manage NuGet Packages for Solution), search and install Syncfusion.Blazor.Calendars and Syncfusion.Blazor.Themes. Alternatively, you can utilize the following package manager command to achieve the same.

Install-Package Syncfusion.Blazor.Calendars -Version 23.1.36

Install-Package Syncfusion.Blazor.Themes -Version 23.1.36


Syncfusion Blazor components are available in Refer to NuGet packages topic for available NuGet packages list with component details.

Now, import and add the Syncfusion Blazor components in the ~/Component.razor file. For example, the Calendar component is imported and added in the ~/Component.razor page.

@using Syncfusion.Blazor.Calendars

<div class="my-component">
This Blazor component is defined in the <strong>RazorClassLibrary</strong> package.
</div><br />

<SfCalendar TValue="DateTime"></SfCalendar>

Create a Blazor project in Visual Studio with Razor Class Library (RCL)

Refer to the Blazor Tooling documentation to create a new Blazor Server App or Blazor WebAssembly App using Visual Studio.

Configure the Razor Class Library and Blazor Application

  1. Now, Right-click the solution, and then select Add/Existing Project.

    razor class library in blazor app

  2. Add the Razor Class Library project by selecting the RazorClassLibrary.csproj file.

    add RCL in blazor app


    Razor Class Library project is added to the existing Blazor Server Application.

  3. Right-click the Blazor App project, and then select Add/Project reference. Now, click the checkbox and configure the Razor Class Library and Blazor Server App or Blazor WebAssembly App .

    reference manager in blazor app

    select RCL to configure blazor app

Importing Razor Class Library in the Blazor Application

  1. Open ~/_Imports.razor file in Blazor Server App or Blazor WebAssembly App and import the RazorClassLibrary.

     @using RazorClassLibrary
  2. Now, register the Syncfusion Blazor Service in the ~/Program.cs file of your Blazor Server App or Blazor WebAssembly App.

using Microsoft.AspNetCore.Components;
    using Microsoft.AspNetCore.Components.Web;
    using Syncfusion.Blazor;
    var builder = WebApplication.CreateBuilder(args);
    // Add services to the container.
    var app = builder.Build();
using Microsoft.AspNetCore.Components.Web;
    using Microsoft.AspNetCore.Components.WebAssembly.Hosting;
    using Syncfusion.Blazor;
    var builder = WebAssemblyHostBuilder.CreateDefault(args);
    builder.Services.AddScoped(sp => new HttpClient { BaseAddress = new Uri(builder.HostEnvironment.BaseAddress) });
    await builder.Build().RunAsync();
  1. Now, add the Syncfusion Blazor theme and script resources to the Blazor Server App or Blazor WebAssembly App based on the requirements of Syncfusion Blazor components.

    a) For .NET 6 project, add the Syncfusion bootstrap4 theme in the <head> element of the ~/Pages/_Layout.cshtml page.

    b) For .NET 7 project, add the Syncfusion bootstrap4 theme in the <head> element of the ~/Pages/_Host.cshtml page.

    c) For Blazor WebAssembly app, add the Syncfusion bootstrap4 theme in the <head> element of the ~/wwwroot/index.html page.

         <link href="_content/Syncfusion.Blazor.Themes/bootstrap4.css" rel="stylesheet" />
         <script src="_content/Syncfusion.Blazor.Core/scripts/syncfusion-blazor.min.js" type="text/javascript"></script>


    Also, you can refer to the themes through the CDN version by using the following link instead of package theme reference.

  2. Now, add the created custom component in the ~/Pages/Index.razor file.

  3. Run the application, The Syncfusion Blazor Calendar component will be rendered in the default web browser.

    RCL output