C# driver - include or exclude after slice

Working with Data Drivers
1

Hi, is it possible to do exclude after slice? I am currently trying to do something like this:

var projection = Builders<MappingDefinitions>.Projection
                .Slice("Definitions", skip: (request.PageNumber - 1) * request.PageSize, limit: request.PageSize)
                .Exclude("Definitions.MappingValues");

But a problem arises:

MongoDB.Driver.MongoCommandException: Command find failed: Path collision at Definitions.MappingValues remaining portion MappingValues.