How to use Where clause in a ICollection

Question

Hi I have a ICollection:

using System.Linq;
...
public virtual ICollection<MyObject> MyList { get; set; }

And want to get the first result or use a Where clause for find a result in the implemented property, for example:

var x = test.MyList.Where(c => c.MyId == 1);

But my object do not list the methods like Where or FirstOrDefault

Use `.First(c => c.MyId == 1)` or `.FirstOrDefault(c => c.MyId == 1)` and close question. Further reading http://www.tutorialspoint.com/linq/ — Sergey Berezovskiy, Jan 30 '17 at 16:29
To improve future question please carefully read [MCVE] guidance on posting code. — Alexei Levenkov, Jan 30 '17 at 17:01
Why can't you provide sample that demonstrates the problem and exact error message? There is no way for others to know what did you do wrong to get seemingly correct code to fail at compile time. — Alexei Levenkov, Jan 30 '17 at 17:46

score 1 · Accepted Answer · answered Jan 30 '17 at 16:30

1

This should do it:

var x = test.MyList.Where(c => c.MyId == 1).FirstOrDefault();

answered Jan 30 '17 at 16:30

Damjan Tomic

I tried this but it did not work or listed the methods. My object is a ICollection – Alexandre Nascimento Jan 30 '17 at 16:36
Try adding using System.Linq; to the using block (I guess you mean Visual Studio IntelliSense doesn't list the methods?) – Damjan Tomic Jan 30 '17 at 16:40
I use System.Linq but does not work, why? – Alexandre Nascimento Jan 30 '17 at 17:07

1 Answers1