编辑“︁C Sharp NoSQL 数据库”︁（章节）

== C# 与 MongoDB 示例 ==
MongoDB 是一个流行的文档数据库，以下是C#中使用官方驱动操作MongoDB的示例。

=== 安装驱动 ===
通过NuGet安装MongoDB驱动：
<syntaxhighlight lang="bash">
dotnet add package MongoDB.Driver
</syntaxhighlight>

=== 连接数据库 ===
<syntaxhighlight lang="csharp">
using MongoDB.Driver;

// 连接字符串
var connectionString = "mongodb://localhost:27017";
var client = new MongoClient(connectionString);
var database = client.GetDatabase("testdb");
var collection = database.GetCollection<BsonDocument>("users");
</syntaxhighlight>

=== 插入文档 ===
<syntaxhighlight lang="csharp">
var document = new BsonDocument
{
    { "name", "John Doe" },
    { "age", 30 },
    { "email", "john@example.com" }
};
collection.InsertOne(document);
</syntaxhighlight>

=== 查询文档 ===
<syntaxhighlight lang="csharp">
var filter = Builders<BsonDocument>.Filter.Eq("name", "John Doe");
var result = collection.Find(filter).FirstOrDefault();
Console.WriteLine(result?.ToString());
</syntaxhighlight>

'''输出：'''
<pre>
{ "_id": ObjectId("..."), "name": "John Doe", "age": 30, "email": "john@example.com" }
</pre>