The good-old red underline appears with the following error (on line 4):
using System.Data.SqlClient; using System.IO; using System.Windows.Forms; using theDLLsNameSpace; //The problem is here namespace XYZ . .
The type of namespace name 'theDLLsNameSpace' could not be found (are you missing a using directive or an assembly reference?)By the way, I compiled the code myself (someone else's original code) in x86. The x86 is just because we've avoided some bugs doing it that way.
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