/// <summary>
/// Gets the full downcast object by going through multi-class-inheritance classes.
/// </summary>
/// <param name="userType">The user type that has multi-class-inheritance.</param>
/// <returns>Fully downcasted C# object.</returns>
public static UserType GetDowncast(this UserType userType)
{
IMultiClassInheritance mci = userType as IMultiClassInheritance;
while (mci != null)
{
userType = mci.DowncastParent as UserType;
mci = userType as IMultiClassInheritance;
}
return(userType);
}
/// <summary>
/// Helper function for doing downcasting.
/// </summary>
/// <typeparam name="T">Type to do the cast to.</typeparam>
/// <param name="userType">The user type to be downcasted.</param>
private static T AsDowncast <T>(UserType userType)
where T : UserType
{
while (userType != null)
{
T result = userType as T;
if (result != null)
{
return(result);
}
IMultiClassInheritance mc = userType as IMultiClassInheritance;
userType = mc?.DowncastParent;
}
return(null);
}
