blazor-docs/knowledge-base/common-code-examples-in-documentation-do-not-compile.md

title	description	type	page_title	slug	position	tags	ticketid	res_type
Code examples in documentation do not compile	Preview of the code examples in documentation does not work	troubleshooting	Code examples in documentation do not compile	common-kb-code-examples-in-documentation-do-not-compile		repl, code, example, snippet, documentation, throw, do not, work, compile	1565701	kb

Environment

Product

UI for Blazor

Description

I am trying to run the code snippets in the documentation but they do not compile. The Preview tab of the examples throws an error.

Error Message

Unhandled Exception: System.MissingMethodException: Method not found: Microsoft.Extensions.DependencyInjection.IServiceCollection

Solution

To solve this, clean the site data:

1. Open your DevTools
2. Go to Application tab
3. Select Storage
4. Click the Clear site data button
5. Refresh the page