var propertyType = propertyInfo.PropertyType;if (propertyType.IsGenericType &&        propertyType.GetGenericTypeDefinition() == typeof(Nullable<>))    {      propertyType = propertyType.GetGenericArguments()[0];    }model.ModelProperties.Add(new KeyValuePair<Type, string>                        (propertyType.Name,propertyInfo.Name));

反射IsGenericType