Update EF Entity

gistfile1.cs

public static class EntityExtensions
{
    public static void MergeChanges<TEntity>(this TEntity targetEntity, TEntity sourceEntity) where TEntity: IPersistable
    {
        var publicWritableProps = typeof(TEntity).GetProperties(BindingFlags.Instance | BindingFlags.Public);
        foreach (var prop in publicWritableProps)
        {
            if (prop.Name != "PersistenceKey")
            {
                var newValue = prop.GetValue(sourceEntity, null);
                prop.SetValue(targetEntity, newValue, null);
            }
        }
    }
}