Not enough string examples in LINQ documentation

### Type of issue

Typo

### Description

Examples based on sequences of integers are not easily mapped into methods using strings or more complex objects. It would be helpful to include a chapter on the taxonomy of objects associated with LINQ queries and how to navigate result sets. Also, it would be helpful to see the mapping to or from SQL. Documentation relying mostly on examples leaves too many gaps in understanding.

### Page URL

https://learn.microsoft.com/en-us/dotnet/csharp/linq/get-started/features-that-support-linq

### Content source URL

https://github.com/dotnet/docs/blob/main/docs/csharp/linq/get-started/features-that-support-linq.md

### Document Version Independent Id

4acdf794-e3a3-4c90-e530-a5f471b81d08

### Article author

@BillWagner

### Metadata

* ID: 9c9b6949-2e0b-ce4f-1717-1964cea61496
* Service: **dotnet-csharp**
* Sub-service: **csharp-linq**

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