mstest

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If a component has a child content parameter that is a RenderFragment<TValue>, then the parameter builder's AddChildContent method should throw an exception with an error message telling the user to use .Add(p => p.ChildContent, ...) instead.

For example, the following should throw an helpful exception:

var cut = RenderComponent<Virtualize<string>>(ps => ps
	.Add(p => p.Items, Te