using MongoDB.Driver;
using MongoDB.Bson;

// 连接字符串
var connectionString = "mongodb://localhost:27017";
var client = new MongoClient(connectionString);

// 获取数据库
var database = client.GetDatabase("testDB");

// 获取集合
var collection = database.GetCollection<BsonDocument>("testCollection");

// 插入文档
var document = new BsonDocument
{
    { "name", "John Doe" },
    { "age", 30 },
    { "profession", "Developer" }
};
await collection.InsertOneAsync(document);

// 查询文档
var filter = Builders<BsonDocument>.Filter.Eq("name", "John Doe");
var result = await collection.Find(filter).FirstOrDefaultAsync();
Console.WriteLine(result);

// 更新文档
var update = Builders<BsonDocument>.Update.Set("age", 31);
await collection.UpdateOneAsync(filter, update);

// 删除文档
await collection.DeleteOneAsync(filter);

public class Person
{
    public ObjectId Id { get; set; }
    public string Name { get; set; }
    public int Age { get; set; }
    public string Profession { get; set; }
}

// 获取强类型集合
var typedCollection = database.GetCollection<Person>("people");

// 插入强类型文档
var person = new Person
{
    Name = "Jane Smith",
    Age = 28,
    Profession = "Designer"
};
await typedCollection.InsertOneAsync(person);

// LINQ查询
var results = await typedCollection.Find(p => p.Age > 25).ToListAsync();