external app not working target invocation exception

[AmeerMansour]

I used this template and whenever i run it without modify anything, I get this exception.
https://drive.google.com/file/d/1GMYBRyPuIgU1r9iEOgsfdZJXC2c84TQ-/view?usp=sharing

[AmeerMansour]

I fixed it by removing static constructor of app class
I removed the following lines

static App() { #if WINFORMS global::System.Windows.Forms.Application.EnableVisualStyles(); global::System.Windows.Forms.Application.SetCompatibleTextRenderingDefault(false); #endif }