将枚举字段序列化为BSON时出现异常

public enum MyEnum
{
    Value1,
    Value2,
    Value3
}

public class MyClass
{
    public MyEnum EnumField { get; set; }
}

// 使用MongoDB驱动程序进行序列化
var client = new MongoClient();
var database = client.GetDatabase("mydb");
var collection = database.GetCollection<MyClass>("mycollection");

var obj = new MyClass { EnumField = MyEnum.Value1 };

// 将枚举字段转换为整数值
var document = new BsonDocument { { "EnumField", (int)obj.EnumField } };

// 插入文档
collection.InsertOne(document);