Not helpful documentation

The Returns and Remarks section is too brief and does not explain clearly what the method does. A real example would explain the application of this method.

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#### Document Details

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* ID: 3239bb41-1ef3-f64b-4a45-1ae747a96643
* Version Independent ID: 3b725311-f6b1-5321-be79-f46ff04b221c
* Content: [Task.Yield Method (System.Threading.Tasks)](https://docs.microsoft.com/en-us/dotnet/api/system.threading.tasks.task.yield?view=netframework-4.7.2)
* Content Source: [xml/System.Threading.Tasks/Task.xml](https://github.com/dotnet/dotnet-api-docs/blob/master/xml/System.Threading.Tasks/Task.xml)
* Product: **dotnet-api**
* GitHub Login: @dotnet-bot
* Microsoft Alias: **dotnetcontent**