wpf - Cannot convert type IEnumerable to ObservableCollection...are you missing a cast?

Question

I'm trying to return entities where the bool "isAssy" is true:

 public ObservableCollection<MasterPartsList> ParentAssemblyBOM
 {
      get {return this._parentAssemblyBOM.Where(parent => parent.isAssy == true); }
 }

but the entire statement is underlined in red stating that I cannot "convert type IEnumerable to ObservableCollection...are you missing a cast?"

Answer 1

ObservableCollection<T> has an overloaded constructor that accepts an IEnumerable<T> as a parameter. Assuming that your Linq statement returns a collection of MasterPartsList items:

public ObservableCollection<MasterPartsList> ParentAssemblyBOM
{
    get 
    {
        var enumerable = this._parentAssemblyBOM
                             .Where(parent => parent.isAssy == true);

        return new ObservableCollection<MasterPartsList>(enumerable); 
    }
}