/// <summary>
/// Adds new entity to DB context.
/// SaveChanges() needs to be called afterwards.
/// </summary>
/// <typeparam name="TEntity"></typeparam>
/// <param name="db"></param>
/// <param name="entity"></param>
/// <returns></returns>
public static TEntity AddEntity <TEntity>(this DbContext db, TEntity entity) where TEntity : class
{
if (entity != null)
{
db.AddEntities(new[] { entity });
}
return(entity);
}