TextBox input in Chinese Traditional

I have installed Chinese Simplified and Traditional language packs in Windows 10.  I run the Silverlight application and can input Chinese Simplified characters by choosing that from the list of language keyboards available.  But when I clear all the text in the TextBox and then switch to Traditional and type, the characters all seem to go in the first character position and when I leave the TextBox, it seems to clear out the values.  Nothing ends up in the TextBox.

I am running this app NOT in Windowless mode cause I already ran into that problem.

Anyone have ideas?