Fixed Selection / Refresh Issues with Grids

Tweaked DynamicCrossJoinGrid properties

inabox.wpf/DynamicGrid/DynamicCrossJoinGrid.cs

@@ -8,27 +8,20 @@ using System.Threading.Tasks;
 
 namespace InABox.DynamicGrid
 {
-    public class DynamicCrossJoinGrid<TEntity, TLeft> : DynamicDataGrid<TEntity>
+    public abstract class DynamicCrossJoinGrid<TEntity, TLeft> : DynamicDataGrid<TEntity>
         where TEntity : Entity, IRemotable, IPersistent, new()
         where TLeft : Entity
     {
         
         public TLeft? Left { get; set; }
-        public Expression<Func<TEntity, Guid>>? LeftMapping { get; init; }
-        public Expression<Func<TLeft, Guid>>? LeftProperty { get; init; }
+        public abstract Expression<Func<TEntity, Guid>> LeftMapping { get; }
+        public abstract Expression<Func<TLeft, Guid>> LeftProperty { get; }
 
         public DynamicCrossJoinGrid()
         {
             Options.BeginUpdate().Clear().Add(DynamicGridOption.SelectColumns).EndUpdate();
         }
 
-        public DynamicCrossJoinGrid(TLeft left, Expression<Func<TEntity, Guid>> leftMapping, Expression<Func<TLeft, Guid>> leftProperty)
-        {
-            Left = left;
-            LeftMapping = leftMapping;
-            LeftProperty = leftProperty;
-        }
-
         protected override void GenerateColumns(DynamicGridColumns columns)
         {
             base.GenerateColumns(columns);