Skip is currently supported at the top level but not in aggregation expressions.
Note that Take is already supported.
- is related to
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                    CSHARP-3318 LINQ3: Inventory the known universe of LINQ methods to be supported -         
- Backlog
 
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- related to
- 
                    CSHARP-5451 Support Take with Range in LINQ -         
- Backlog
 
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