public TextTableCollectionPropertyDescriptor(TextTableCollection coll, int idx) : base("#" + idx.ToString(), null)
 {
     this.collection = coll;
     this.index = idx;
 }
 public TextTableCollectionPropertyDescriptor(TextTableCollection coll, int idx) : base("#" + idx.ToString(), null)
 {
     this.collection = coll;
     this.index      = idx;
 }