{"APIName":{$regex:/cgi-bin\/user\/getuserinfo/,'$options':'i'}}

{"RequestBody":{$regex:/B27532093400375009/}}

db.EvaluateRelation.update(               
{"EvaluatorNoId" : "c1363","EvaluatedNoId" : "02255"},  
{ $set: {"IsDeleted" : false} },
{multi:true}
)

db.AddedCount.remove(               
{"_id" : {$in:["c0553.3","02669.3"]}}, 
{multi:true}
)

db.APILogs.createIndex({"RequestTime":-1})
db.APILogs.ensureIndex({"APIName":1,"IsError":1})

var filter = Filter.Or(
    Filter.Where(x => x.Email.Contains(keyWord.ToLower())),
    Filter.Where(x => x.WorkerUserId.Contains(keyWord.ToLower())));

var filter = Filter.Regex(x => x.EnglishName, new MongoDB.Bson.BsonRegularExpression(keyWord, "i"));

var filter = Filter.Or(
         Filter.Regex(x => x.EnglishName, new BsonRegularExpression(new Regex(keyWord, RegexOptions.IgnoreCase))),
         Filter.Regex(x => x.EnglishName, new BsonRegularExpression(keyWord)));

int skip = (pageNo - 1) * pageSize;

await this.GetListAsync(filter: _filter, sort: Sort.Ascending(x => x.HireDate), limit: pageSize, skip: skip);

//无状态
await this.InsertAsync(surveyAnswers);
//有状态
await this.InsertAsync(surveyAnswers, writeConcern: WriteConcern.Acknowledged);

await this.CountAsync(filter: filter, readPreference: ReadPreference.PrimaryPreferred);

//无状态
this.InsertBatchAsync(surveyAnswers);
//有状态
this.InsertBatchAsync(surveyAnswers, writeConcern: WriteConcern.Acknowledged);

this.FindOneAndUpdateAsync(filter, update);

    public class Question : IAutoIncr<int>
    {
        [BsonId]
        public int ID { get; set; }
	}

    public class RecommendRelation : IEntity<string>
    {
        [BsonId]
        [BsonRepresentation(BsonType.ObjectId)]
        public string ID { get; set; }
	}

            var filter = Filter.And(Filter.In(x => x.ID, ids));

            People people = new People();

            var projection = Projection
                .Include(nameof(people.ID))
                .Include(nameof(people.EN_Sup_Org_Name))
                .Include(nameof(people.CN_Sup_Org_Name));

            return this.GetListAsync(filter: filter, projection: projection);

{
    "TableName" : "frtest66",
    "MenuName" : "test666",
    "DOAdmin_MenuId" : "676db672-212f-4876-b164-22ded65f4cbd",
    "PermissionList" : [ 
        {
            "PmsID" : "0d27cbe577764b72a160bc84c8aa2203",
            "PmsTag" : [ 
                "64ef17e8-37fb-47fa-b630-1682c137e463"
            ],
            "Remark" : "test",
            "OperateType" : [ 
                1, 
                2, 
                4
            ],
            "Status" : 2,
            "IsFullData" : false,
            "PmsInfos" : [ 
                {
                    "ColumnName" : "Name",
                    "ColumnType" : 1,
                    "ColumnValue" : "张三"
                }
            ]
        }
    ]
}
更新Status字段：通过占位符"$"实现
"update" : { "$set" : { "PermissionList.$.Status" : 1 } }

实现代码:
var filter = Filter.And(
                Filter.Eq(nameof(Sys_SingleTableTemplate.PermissionList) + "." + nameof(Sys_Permission.PmsID), param.PermissionID));
            var update = Update
               .Set(nameof(Sys_SingleTableTemplate.PermissionList) + ".$." + nameof(Sys_Permission.Status), param.Sys_DataState);

  return await this.FindOneAndUpdateAsync(filter, update, writeConcern:      WriteConcern.Acknowledged);

/// <summary>
/// 投放ID集合
/// </summary>
public List<MPPutInInfo> PICMList { get; set; }

/// <summary>
/// 更新券规则投放数据
/// </summary>
/// <param name="mppicrID">后台发券规则ID</param>
/// <param name="mpPutInInfo">投放ID集合</param>
/// <param name="title">后台发券规则标题</param>
/// <param name="updateID">最后修改人ID</param>
/// <param name="updateName">最后修改人姓名</param>
/// <returns></returns>
public Task UpdateCouponPutIn(long mppicrID, MPPutInInfo mpPutInInfo, string title, long updateID, string updateName)
{
	var filter = Filter.And(
	Filter.Eq(nameof(MPPutInCouponRule.ID), mppicrID));

	var update = Update
	.Push(x => x.PICMList, mpPutInInfo)
	.Set(nameof(MPPutInCouponRule.Title), title)
	.Set(nameof(MPPutInCouponRule.UpdateID), updateID)
	.Set(nameof(MPPutInCouponRule.UpdateName), updateName)
	.Set(nameof(MPPutInCouponRule.UpdateTime), DateTime.Now);
	return this.FindOneAndUpdateAsync(filter, update);
}