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How to resolve the reference error, “The type or namespace name 'Accordion' does not exist in the 'Syncfusion.JavaScript.Web'"?

Platform: ASP.NET Web Forms |
Control: General |
Published Date: February 16, 2015 |
Last Revised Date: February 16, 2015 |
Product Version:


While compiling the application, the reference error messageThe type or namespace name 'Accordion' does not exist in the namespace 'Syncfusion.JavaScript.Web' (are you missing an assembly reference?)" appears.

 The following screenshot displays the error.

Figure 1: Error message


In order to avoid the Accordion does not exist issue, refer to the Syncfusion.EJ.Web assembly in the project. The following assembly information table helps you choose the correct assembly version.

Table 1: DLL Reference

 .NET Framework Version

Assembly Version(







Refer to the corresponding assemblies for adding the Syncfusion ASP.NET controls in the web applications as given in the following link:


In order to render the controls, you have to add the required script files and CSS files in your application. You can follow the steps given in the UG documentation link as follows:


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