Making sure Builder method of PatchOperationListBuilder doesnt includ…

…e null PatchOpeartion in the list

Program.cs

@@ -551,6 +551,6 @@ public PatchOperationListBuilder WithSet(object value, Func<PropertyInfo, bool>?
             return this;
         }
 
-        public PatchOperationList Build() => _patchOperations;
+        public PatchOperationList Build() => _patchOperations.Where(op=> op is not null).ToList();
     }
 }