Add a KB on null reference exception from the GridRowCollection class

[svdimitr]

Related to: #8796

[yordan-mitev]

As the issue is version-related, you can add the affected versions to the table. In this case, they are "3.0.0 and later".

[yordan-mitev]

Probably no client will search with the exact string "<3.0.0" or ">3.0.0", so there is no need to make the sentence hard to read by using these strings. Mention the affected versions in the ## Cause section.

Suggested change

	I upgraded the version of the Telerik UI from Blazor components from `<3.0.0` to `>3.0.0` and I get a `NullReferenceException` from the `GridRowCollection` class.
	I upgraded the version of the Telerik UI from Blazor components and I get a `NullReferenceException` from the `GridRowCollection` class.

[yordan-mitev]

If the message spans multiple rows, present the entire message as a code block (```bash error message ```). If it can also appear on a single line, enclose it in backticks and render it as inline code.

[dimodi]

Example for multiline error messages: https://docs.telerik.com/blazor-ui/knowledge-base/root-component-null-reference

You can skip the backticks.

[yordan-mitev]

Example for multiline error messages: https://docs.telerik.com/blazor-ui/knowledge-base/root-component-null-reference

You can skip the backticks.

@dimodi Just because you can do it doesn't mean that you should. The Formatting article in the Style Guide clearly prescribes using monospace for the error messages. Using a note of type warning to present an error message is not allowed.

[dimodi]

Neither "rowcollection", nor "nullreference" exist as separate words like this in the error message. Using them in the URL is not optimal, because the URL affects SEO a lot. Consider this:

grid-nullreferenceexception-gridrowcollection.md

[dimodi]

Suggested change

	description: Fixing a Null Reference Exception Thrown from the GridRowCollection.
	description: How to fix a null reference exception thrown for the GridRowCollection property of the Telerik Blazor Grid.

[dimodi]

If you change the .md file name, make the slug consistent, e.g.

Suggested change

	slug: grid-kb-nullref-gridrowcollection
	slug: grid-kb-nullreferenceexception-gridrowcollection

[dimodi]

If the developer has used OnRead for some reason, it's unlikely they will go back to Data. Thus the primary recommendation can be phrased in a different way. For example, focus on the new way to use OnRead and link the relevant documentation here. The "See Also" links are less visible by definition.