Add empty element to list
c#, entity-framework, linq
Solution
You need to replace `ToList()` with `AsEnumerable()` in the line that declares `lst`.
The problem is that `lst` is of type `List<anonymous type>` but `Union` returns `IEnumerable<anonymous type>`. An `IEnumerable<T>` can't be assigned to a variable of type `List<T>`.
Using `AsEnumerable()` makes the `lst` variable of type `IEnumerable<anonymous type>`.
Problem
I have list: ``` var Filials = Db.FILIALS.AsEnumerable().Where(x => x.PREFIX > 0).Select(x => new { Name = string.Format("{0} {1}", x.PREFIX, x.NAME), FilialId = (Guid?)x.FILIALID }).OrderBy(x => x.Name).ToList(); ``` I need to add empty element to this list. I try this variant: ``` var lst = new[] { new { Name = string.Empty, FilialId = (Guid?)null } }.ToList(); var Filials = Db.FILIALS.AsEnumerable().Where(x => x.PREFIX > 0).Select(x => new { Name = string.Format("{0} {1}", x.PREFIX, x.NAME), FilialId = (Guid?)x.FILIALID }).OrderBy(x => x.Name).ToList(); lst = lst.Union(Filials); ``` But get error: Cannot implicitly convert type System.Collection.Generic.IEnumerable to System.Collection.Generic.List on last line. What is correct way to add element to list?