private static BindingNotification Merge(BindingNotification a, object b)
{
var bn = b as BindingNotification;
if (bn != null)
{
Merge(a, bn);
}
else
{
a.SetValue(b);
}
return(a);
}
private static BindingNotification Merge(BindingNotification a, BindingNotification b)
{
if (b.HasValue)
{
a.SetValue(b.Value);
}
else
{
a.ClearValue();
}
if (b.Error != null)
{
a.AddError(b.Error, b.ErrorType);
}
return(a);
}