Needs a syntax example for setting FontWeight values in C# / C++

The syntax for setting Fontweight in C# / C++ isn't entirely intuitive. It isn't difficult to find an example through Google, but this vital information about the use of this class belongs in the documentation. The possible values are on this page, so it makes sense to also give information on how to SET those values.
Developers shouldn't need to open up a stack overflow thread for something this basic.

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#### Document Details

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* ID: 521252b3-7520-e140-0bd7-a525a4d60301
* Version Independent ID: 9a14188c-0945-38d2-bf67-83f54e5717d7
* Content: [FontWeights Class (System.Windows)](https://docs.microsoft.com/en-us/dotnet/api/system.windows.fontweights?view=netframework-4.7.2)
* Content Source: [xml/System.Windows/FontWeights.xml](https://github.com/dotnet/dotnet-api-docs/blob/master/xml/System.Windows/FontWeights.xml)
* Product: **dotnet-api**
* GitHub Login: @dotnet-bot
* Microsoft Alias: **dotnetcontent**