Count() a specfic attribute within a list c#

Question

if (gardenvlist.Count() == getava.Count())
{

}
else if(oceanvlist.Count() == getava.Count())
{

}
else if (cityvlist.Count() == getava.Count())
{

}

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Answer 1

Use the overload which takes a predicate. Here is the signature:

public static int Count(this IEnumerable source, 
    Func predicate);

Imaging you have this:

public class Room
{
    public string Name { get; set; }
}

Then you put them into a list:

var rooms = new List()
{
    new Room { Name = "Living" },
    new Room { Name = "Kitchen" }
};

You want to know how many rooms have the name "Living":

int count = rooms.Count(x => x.Name == "Living");