C# FireStore，从文档中获取值

using Google.Cloud.Firestore;

FirestoreDb db = FirestoreDb.Create("your-project-id");

DocumentReference docRef = db.Collection("collection-name").Document("document-id");

DocumentSnapshot snapshot = await docRef.GetSnapshotAsync();

if (snapshot.Exists)
{
    // 文档存在，可以获取值
}

if (snapshot.Exists)
{
    Dictionary<string, object> data = snapshot.ToDictionary();
    object value = data["field-name"];
    // 使用获取到的值进行后续操作
}