'Value' property was already registered by ...

Hello,

I have 2 User Control.

I put this code on UserControl1:

//...

public static readonly DependencyProperty ValueProperty =
    DependencyProperty.Register("Value", typeof(object),
        typeof(UserControl1), new PropertyMetadata(null));

//...

I run program, and I use it without any problem.

On UserControl2 I put the same code:

//...

public static readonly DependencyProperty ValueProperty =
    DependencyProperty.Register("Value", typeof(object),
        typeof(UserControl2), new PropertyMetadata(null));

//...

When I run program, VS return this erro:

'Value' property was already registered by 'UserControl1'

How can I solve these problem? (without rename 'Value', because I need the 2 UserControls with this property.

Regards, ADAE.