LINQ query to update property of a list

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0

I am trying to convert the following code to linq:

 for (int i = 0; i < List.Count;i++ )
                {
                    List[i].IsActive = false;
                    if(List[i].TestList != null)
                    {
                        for(int j = 0;j<List[i].TestList.Count;j++)
                        {
                            List[i].TestList[j].IsActive = false;
                        }
                    }
                }

I tried the following query :

(from s in List select s).ToList().ForEach((s) =>
                        {
                            s.IsActive = false;
                            (from t in s.TestList where t == null select t).ToList().ForEach((t) =>
                                {
                                    t.IsActive = false;
                                });
                        });

But i get an error when TestList is null in the list. I am not sure what I am doing wrong here.

asked 2 mins ago

perplexedDev

30

LINQ query to update property of a list