Unable to run Framework project, System.Argument exception for apparent duplicate dictionary key

[Yoichi]

Hi,

In this case, it’s necessary to modify duplicated key in the xaml file directly using text editor.
There are 2 or more VisualBasicValue1_1 in the xaml, then modify one of them to VisualBasicValue1_2 , for example.

Please see the following post in details.

After Windows Conversion: "Unable to start execution: An item with the same key has already been added. Key: VisualBasicValue `1_1 "

SOLUTION! Took a while to dig into this, but I found that after converting a project from the Legacy framework to the Windows framework, it would not compile the Main.xaml any longer. Eventually, I found that the “VisualBasicValue1_1" key was being used for 2 different transitions. (In addition, "VisualBasicValue1_2” was also being used twice.) The new Windows framework did not like the fact that two transitions were being assigned the same key. (See below.) All I did to fix it was change one…

Regards,