Failed string.Format w/ Parameters using CJK

I recently ran into an issue in a localized application that was using the C# .Net Framework string.Format("blah-blah {0}", parm1).

In English, everything worked fine and as expected. However when using a localized format string (Japanese), the parameter substitution failed:

string.Format("数字は、｛0｝", parm1);

(If you don't have the necessary language pack installed, here is a image representation of the text: )

It turns out that the translated text was using different braces than 0x7B and 0x7D. In the translated text the left brace was 0xFF5B. Looks like a brace, but isn't for the purposes of string.Format. Further, in looking at the MS Mincho char set, I couldn't find that particular brace. Using the Alt+65371 trick for that character in notepad, I'd get a left bracket -- don't know what/where the brace comes from...

The simple fix was to change the 0xFF5B brace to the correct 0x7B, and then string.Format worked as expected.