Fixed an issue where attributes of the same name cannot be expanded w…

…hen subclasses inherit and hide attributes of the parent class (#645)

* Fixed an issue where attributes of the same name cannot be expanded when subclasses inherit and hide attributes of the parent class

* This code fixes an issue where 'History of code' was unable to obtain attributes with the same name as the parent class after the subclass hid the parent class member.

src/Microsoft.AspNetCore.OData/Query/Expressions/SelectExpandBinder.cs

@@ -231,7 +231,22 @@ public virtual Expression CreatePropertyValueExpression(QueryBinderContext conte
             PropertyInfo propertyInfo = source.Type.GetProperty(propertyName, BindingFlags.DeclaredOnly);
             if (propertyInfo == null)
             {
-                propertyInfo = source.Type.GetProperty(propertyName);
+                /*
+                 History of code:
+                    propertyInfo = source.Type.GetProperty(propertyName);
+                 This code fixes an issue where 'History of code' was unable to obtain attributes with the same name as the parent class after the subclass hid the parent class member.
+                 Such as: 
+                    'History of code' cannot get the Key property of the Child.
+                        public class Father
+                        {
+                            public string Key { get; set; }
+                        }
+                        public class Child : Father
+                        {
+                            public new Guid Key { get; set; }
+                        }
+                 */
+                propertyInfo = source.Type.GetProperties().Where(m => m.Name.Equals(propertyName)).FirstOrDefault();
             }
 
             Expression propertyValue = Expression.Property(source, propertyInfo);