c# - Most reliable way to clean List<T> depending on Predicate<T> -

i have list<t> data , predicate<t> condition.

what way should use clear data depending on condition result?

• option 1:

  var del = data.where(i => condition); data.removeall(i => del.contains(i)); 

• option 2:

  var del = data.where(i => condition); (int = 0; < del.count; i++)     data.remove(del[i]); 

• option 3:

  var del = data.where(i => condition); foreach (var in del)    data.remove(i); 

• option 4:

  data = data.where(i => !condition); 

• any other?

how about:

data.removeall(condition); 

note fourth option won't work without call tolist().