Initial Commit ...

Models/XBaseEventModel.cs

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+namespace xDataService.Models {
+    /// <summary>
+    /// Pass Data on Repository Events ...
+    /// </summary>
+    /// <typeparam name="T"></typeparam>
+    public class XBaseEventModel<T> {
+        public T Model { get; set; }
+
+        public XBaseEventModel (T model) {
+            Model = model;
+        }
+    }
+}

Models/XGraphQueryResult.cs

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+using GraphQL.Types;
+using xModels.Dtos;
+
+namespace xDataService.Models {
+    public class XGraphQueryResult<TEntity, TGraph> : ObjectGraphType<XQueryResult<TEntity>>
+        where TGraph : IGraphType {
+            public XGraphQueryResult () {
+                //
+                Name = $"{typeof(TGraph).Name}QueryResult";
+
+                //
+                Field<ListGraphType<TGraph>> (nameof (XQueryResult<TEntity>.Items));
+                Field (x => x.Page);
+                Field (x => x.PageSize);
+                Field (x => x.TotalPages);
+                Field (x => x.TotalFilteredItems);
+                Field (x => x.TotalItems);
+            }
+        }
+}

Models/XGraphQueryType.cs

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+using GraphQL.Types;
+using xModels.Dtos;
+
+namespace xDataService.Models {
+    public class XGraphQueryType : InputObjectGraphType<XQuery> {
+        public XGraphQueryType () {
+            //
+            Name = "query";
+
+            //
+            Field (x => x.Filter);
+            Field (x => x.ContainsDetail);
+            Field (x => x.SortBy);
+            Field (x => x.IsAscending);
+            Field (x => x.Page);
+            Field (x => x.PageSize);
+        }
+    }
+}