New to Telerik Reporting? Start a free 30-day trial

2026 Q1 (20.0.26.211) Changes and Dependencies

This article explains the manual changes required when upgrading to Telerik Reporting 2026 Q1 (20.0.26.211).

Changes

Report Viewers working with ASP.NET Core WebAPI REST Report Service

Connecting a report viewer to a REST service or Report Server instance in .NET projects now uses System.Text.Json for serialization and no longer depends on Newtonsoft.Json. Remove the Newtonsoft.Json when upgrading from older Reporting projects, as explained in the article JsonResult.SerializerSettings Must Be of Type Newtonsoft.Json.JsonSerializerSettings.

Telerik.Reporting.Services.HttpClient in .NET

Connecting a desktop report viewer (WinForms or WPF) to a REST service or Report Server instance for .NET now uses System.Text.Json for serialization and no longer depends on Newtonsoft.Json.

The .NET implementation of the WebServiceDataSource Component

The WebServiceDataSource for .NET now uses System.Text.Json for serialization and no longer depends on Newtonsoft.Json.

The .NET implementation of the JsonDataSource Component

The JsonDataSource for .NET now uses System.Text.Json for serialization and no longer depends on Newtonsoft.Json.

WPF Report Viewer for .NET Framework

The viewer is built with Telerik UI Controls for WPF 2026.01.211.462. If you are using a newer version, consider adding binding redirects. For more information, see: How to Add report viewer to a WPF .NET Framework project.

WPF Report Viewer for .NET 8

The viewer is built with Telerik UI Controls for WPF 2026.01.211.80 and targets .NET 8.

WinUI Report Viewer

The viewer is built with Telerik UI for WinUI 4.2.0.0. WinUI Report Viewer targets .NET 8.

Standalone Report Designer targeting .NET Framework 4.6.2

TRDX, TRDP, and TRBP report definitions created by the Standalone Report Designer now use schema version http://schemas.telerik.com/reporting/2026/1.0.

Standalone Report Designer for .NET targeting .NET 8.0

TRDX, TRDP, and TRBP report definitions created by the Standalone Report Designer for .NET now use schema version http://schemas.telerik.com/reporting/2026/1.0.

Dependencies

Telerik Licensing

Telerik.Licensing 1.6.40.

Web Report Designer Dependencies

The Web Report Designer depends on the following libraries:

Telerik Kendo UI (2025.4.1111)
Telerik Kendo Themes (12.3.0)
jQuery (3.7.1 or later)
jQuery UI (1.14.1 or later)
Browser's native support for Promise objects. When the browser does not support Promise, the viewer will not try to automatically load it. It's the responsibility of the developer to load Promise functionality from a trusted source in the application.

HTML5 Report Viewer Dependencies

The HTML5 Report Viewer depends on the following libraries:

Telerik Kendo UI (2025.4.1111)
jQuery (3.7.1 or later)
Browser's native support for Promise objects. When the browser does not support Promise, the viewer will not try to automatically load it. It's the responsibility of the developer to load Promise functionality from a trusted source in the application.

Angular Report Viewer Dependencies

The Angular Report Viewer depends on the following:

NodeJS (Active LTS or Maintenance LTS versions)
Angular (19.0.0 to 21.0.0)
jQuery (^1.10.0 || ^2.2.0 || ^3.7.1")

Native Angular Report Viewer

NodeJS (Active LTS or Maintenance LTS versions)
Angular (19.0.0 to 21.0.0)
Kendo UI for Angular (21.1.*)

React Report Viewer Dependencies

The React Report Viewer depends on the following:

React (16.8.6 or later)
React-DOM (16.8.6 or later)
jQuery (3.7.0 or later)

Native Blazor Report Viewer

The viewer is built with Telerik UI for Blazor 9.1.0.

HttpClient Dependencies

Connecting a desktop report viewer (WinForms or WPF) to a REST service or Report Server instance requires the following NuGet packages:

Newtonsoft.Json (13.0.1 or later for .NET Framework projects)
Microsoft.AspNet.WebApi.Client (6.0.0 or later for .NET Framework projects, 5.2.7 or later for .NET Core projects)

WebServiceDataSource Component Dependencies

The WebServiceDataSource requires the following NuGet packages:

Microsoft.Net.Http (2.2.29 or later) - only for .NET Framework projects
Newtonsoft.Json (13.0.1.0 or later) - only for .NET Framework projects

ASP.NET WebAPI REST Report Service Dependencies

The ASP.NET WebAPI REST Report Service requires the following NuGet packages:

Microsoft ASP.NET Web API (5.3.0 or later)
Newtonsoft.Json (13.0.1.0 or later)

StackExchange.Redis version 2.8.16 or greater.

REST Service MSSQL Storage Dependencies

The REST Service with MSSQL Storage implementation depends on:

System.Data.SqlClient version 4.0 (depending on the installed .NET Framework runtime) for .NET Framework projects and Microsoft.Data.SqlClient v6.1.4 or greater for .NET 8+ projects.