- add type of property

GBase/GBaseColumn.cs

@@ -16,12 +16,14 @@ namespace GBase
         /// <summary>
         /// A column of a <see cref="IGBaseTable"/>
         /// </summary>
-        public GBaseColumn(string name)
+        public GBaseColumn(string name, Type type)
         {
             Name = name;
+            Type = type;
         }
         
         public string Name { get; }
+        public Type Type { get; }
 
         /// <summary>
         /// The <see cref="IAsyncDisposable.DisposeAsync"/> method