MyEntity.cs

public class MyEntity : Entity
{
    public MyEntity(string entityName) : base(entityName) { }

    protected string GetAttributeName(string propertyName)
    {
        return "odx_" + propertyName.ToLowerInvariant();
    }

    protected T GetAttribute<T>([CallerMemberName]string propertyName = null)
    {
        return this.GetAttributeValue<T>(GetAttributeName(propertyName));
    }

    protected void SetAttribute(object value, [CallerMemberName]string propertyName = null)
    {
        this.SetAttributeValue(GetAttributeName(propertyName), value);
    }
}