Presentation Model (MVVM) Good Practices

using System;
using System.Collections.Generic;
using System.Text;
using System.ComponentModel;
using System.Reflection;

namespace App.Core
{
    class EntityViewPropertyDescriptor : PropertyDescriptor
    {
        private Type _entityType;
        private Type _entityViewType;
        private PropertyInfo _entityProperty;
        private string _entityViewPropertyName;
        private FieldInfo _entityField;
        MethodInfo _propertyChangeNotification; 

        static Type GetPropertyType(string propertyName, Type entityType)
        {
            return entityType.GetProperty(propertyName).PropertyType;
        }

        static string GetPropertyName(string entityPropertyName, Type entityType)
        {
            return entityType.Name + entityPropertyName;
        }

        public EntityViewPropertyDescriptor(string entityPropertyName, Type entityType, Type entityViewType)
            : base(
            TypeDescriptor.CreateProperty
            (entityViewType, GetPropertyName(entityPropertyName, entityType), GetPropertyType(entityPropertyName, entityType), null))
        {
            _entityType = entityType;
            _entityProperty = _entityType.GetProperty(entityPropertyName);
            _entityViewPropertyName = entityType.Name + entityPropertyName;
            _entityViewType = entityViewType;
            _entityField = _entityViewType.GetField("_entity", BindingFlags.NonPublic | BindingFlags.Instance);
            _propertyChangeNotification = _entityViewType.GetMethod("OnPropertyChanged", BindingFlags.NonPublic | BindingFlags.Instance);
        }

        public override bool CanResetValue(object component)
        {
            return false;
        }

        public override Type ComponentType
        {
            get { return _entityViewType; }
        }

        public override object GetValue(object component)
        {
            object innerEntity = _entityField.GetValue(component);
            return _entityType.GetProperty(_entityProperty.Name).GetValue(innerEntity, null);
        }

        public override bool IsReadOnly
        {
            get { return !_entityProperty.CanWrite; }
        }

        public override Type PropertyType
        {
            get { return _entityProperty.PropertyType; }
        }

        public override void ResetValue(object component)
        {
            throw new NotImplementedException();
        }

        public override void SetValue(object component, object value)
        {
            if (_entityProperty.CanWrite)
            {
                object innerEntity = _entityField.GetValue(component);
                _entityProperty.SetValue(innerEntity, value, null);
                _propertyChangeNotification.Invoke(component, new object[] { _entityViewPropertyName });
            }
        }

        public override bool ShouldSerializeValue(object component)
        {
            return false;
        }


    }
}