Error after installing my program

Question

Hi all,

 

I have developed a winform application using c#. I used visual studio 2015.

I managed to create a setup.exe for my project so that any user can install the project on his or her machine.

After obtaining setup.exe for my project,  I managed to install the project on my pc. The setup then creates a shortcut on the desktop.

After double-clicking the shortcut, the application start, it loads the first 2 forms of the application the it produces an error.

I have attached a screenshot of the error generated.

The error was generated after a successful installation. It was generated when the appliation was running after it has been successfully installed.

 

Note: If i go to build then start application using visual studio 2015, the application runs without interruptions or errors.

 

Please help. Thanks in advance.