private DependencyProperty(string name, Type propType, Type ownerType, PropertyMetadata metadata)
{
Name = name;
PropType = propType;
OwnerType = ownerType;
Metadata = metadata;
}
public static DependencyProperty Register(string name, Type propertyType, Type ownerType, PropertyMetadata metadata)
{
// Add a new list if this is the first time we've registered a property for this type
if (!registeredPropertiesByOwner.ContainsKey(ownerType))
registeredPropertiesByOwner.Add(ownerType, new List<DependencyProperty>());
var existingList = registeredPropertiesByOwner[ownerType];
// Now let's check to see if we've already registered a property with this type
var existingProperty = existingList.FirstOrDefault(dp => dp.Name == name);
if (existingProperty != null)
throw new ArgumentException(string.Format("Dependency Property already registered with name {0}", name));
var newProperty = new DependencyProperty(name, propertyType, ownerType, metadata);
existingList.Add(newProperty);
return newProperty;
}