C#•16mo ago

❔ Cannot convert lambda expression to type 'Activity' because it is not a delegate type error

So I want to check if List contains element with todays date but tis error occurs: CS1660 Cannot convert lambda expression to type 'Activity' because it is not a delegate type Here is definition of class:

public class MemberStats
{
    [BsonElement("userID")]
    public ulong UserId { get; set; }

    [BsonElement("Activity")]
    public List<Activity> MessagesPerDay { get; set; }
}

public class Activity
{
    public DateTime Day { get; set; }
    public int Messages { get; set; }
}

public class MemberStats
{
    [BsonElement("userID")]
    public ulong UserId { get; set; }

    [BsonElement("Activity")]
    public List<Activity> MessagesPerDay { get; set; }
}

public class Activity
{
    public DateTime Day { get; set; }
    public int Messages { get; set; }
}

and here is where error occurs:

 if (Stats.MessagesPerDay.Contains(act => act.Date == DateTime.Today))
 {

 }

 if (Stats.MessagesPerDay.Contains(act => act.Date == DateTime.Today))
 {

 }

I have no idea what delegate means so9 any help would be appericiated!

9 Replies

Kouhai•16mo ago

Contains doesn't take a delegate, use Any instead

CTJOP•16mo ago

Oh I forgot about this one Thanks!

Kouhai•16mo ago

CTJOP•16mo ago

Are we not closing those anymore?

CTJOP•16mo ago

Kouhai•16mo ago

Angius•16mo ago

Accord is having a moment

CTJOP•16mo ago

Yea no problem, I did it by hand then lol

Accord•16mo ago

Was this issue resolved? If so, run /close - otherwise I will mark this as stale and this post will be archived until there is new activity.

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❔ Cannot convert lambda expression to type 'Activity' because it is not a delegate type error