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$project mongodb Code Example
mongodb project 
{ $project: { "contact.address.country": 1, contact: 1 } }
mongodb project all fields 
db.collection.aggregate([
    { "$addFields": { "custom_field": "$obj.obj_field1" } }
])
Source: stackoverflow.com
project mongodb c# 
int count = 1;
await collection.Find(FilterDefinition<Student>.Empty)
    .Project(x => new {x.FirstName, x.LastName})
    .ForEachAsync(
        student =>
        {
            Console.WriteLine($"{count}. \t FirstName: {student.FirstName} - LastName {student.LastName}");
            count++;
        });

Console.WriteLine();
Source: www.codementor.io
$project mongodb 
{ $project: { "<field1>": 0, "<field2>": 0, ... } } // Return all but the specified fields
Source: docs.mongodb.com



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Category:
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Sub Category:
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