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+---
+title: A guide on fixing the BC30002: The type Global.Telerik.Web.UI.RadGrid is not defined error 
+type: troubleshooting
+page_title: Fix 'Type RadGrid Not Defined' Error in ASP.NET Web Forms Projects
+slug: common-bc30002-error-telerik-ui-aspnet-ajax
+tags: [radgrid, asp.net ajax, error bc30002, migration, visual studio]
+res_type: kb
+ticketid: 1659393
+---
+
+## Environment
+
+| Product | Telerik UI for ASP.NET AJAX / RadGrid |
+| --- | --- |
+| Version | all |
+
+## Description
+
+I am getting a compilation error "BC30002: The type 'Global.Telerik.Web.UI.RadGrid' is not defined" in Visual Studio. This issue persists despite removing all references to old DLLs, cleaning, and recompiling the project.
+
+## Cause
+
+This error may arise upon migration from RadControls for ASP.NET (Classic) to Telerik UI for ASP.NET AJAX due to improper assembly references, outdated entries in the `web.config` file, or issues related to the `licenses.licx` file.
+
+## Solution
+
+Follow these steps to resolve the error:
+
+- **Ensure Correct Assembly Reference**: Update the Telerik.Web.UI assembly reference in your project. Remove the existing reference and re-add it, ensuring it points to the new DLL file. Reference update instructions can be found [here](https://docs.telerik.com/devtools/aspnet-ajax/knowledge-base/common-update-assembly-reference).
+
+- **Web.config Update**: Ensure your `web.config` file's assembly version matches the version of the Telerik UI for ASP.NET AJAX DLLs you're using. Include an assembly binding redirect like the following:
+
+```xml
+<configuration>
+  <runtime>
+    <assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">
+      <dependentAssembly>
+        <assemblyIdentity name="Telerik.Web.UI" publicKeyToken="121fae78165ba3d4" culture="neutral" />
+        <bindingRedirect oldVersion="0.0.0.0-2024.2.513.462" newVersion="2024.2.513.462" />
+      </dependentAssembly>
+    </assemblyBinding>
+  </runtime>
+</configuration>
+```
+
+- **Delete the licenses.licx File Contents**: Clear the contents of the `licenses.licx` file as described in the [How To Fix License File Related Errors](https://docs.telerik.com/devtools/aspnet-ajax/knowledge-base/common-how-to-fix-license-file-related-errors) article.
+
+- **Update Control Registered Directive**: If not using the Global Assembly Cache, update or remove fully qualified names from the control registered directive. For global access in all project pages, add the following to your `web.config`:
+
+```xml
+<system.web>
+  <compilation debug="true" targetFramework="4.8" />
+  <httpRuntime targetFramework="4.8" />
+  <pages>
+    <controls>
+      <add tagPrefix="telerik" namespace="Telerik.Web.UI" assembly="Telerik.Web.UI" />
+    </controls>
+  </pages>
+</system.web>
+```
+
+- **Clean Visual Studio and ASP.NET Cache**: Follow the instructions to [Clean Up ASP.NET and Visual Studio Cache and Temp Files](https://docs.telerik.com/devtools/aspnet-ajax/knowledge-base/common-cleanup-asp-vs-cache-and-temp).
+
+- **Restart Visual Studio and Your Development/Server Machine**: This can help refresh any cached configurations or assemblies.
+
+Additionally, check out this [forum thread](https://www.telerik.com/forums/bc30002-type-%27telerik-web-ui-radchart%27-is-not-defined) and the official [Microsoft article](https://learn.microsoft.com/en-us/dotnet/visual-basic/language-reference/error-messages/type-typename-is-not-defined) for more information on the error. 
+
+If the issue persists after following these steps, please share any additional error messages or project configuration details for further assistance.
+
+## See Also
+
+- [Migration from ASP.NET (Classic) to ASP.NET AJAX](https://docs.telerik.com/devtools/aspnet-ajax/knowledge-base/grid-migration-from-aspnet-classic-to-aspnet-ajax)
+- [Common Update Assembly Reference](https://docs.telerik.com/devtools/aspnet-ajax/knowledge-base/common-update-assembly-reference)
+- [How To Fix License File Related Errors](https://docs.telerik.com/devtools/aspnet-ajax/knowledge-base/common-how-to-fix-license-file-related-errors)
+- [Clean Up ASP.NET and Visual Studio Cache and Temp Files](https://docs.telerik.com/devtools/aspnet-ajax/knowledge-base/common-cleanup-asp-vs-cache-and-temp)