c# - System.UnauthorizedAccessException while running .exe under program files

Question

Through WiX installer I installed my Windows application and folder is being created under c:ProgramFiles with .exe and required dll's.

While running the .exe I am getting the System.UnauthorizedAccessException.

Please let me know if there any helpful suggestions.

Please find the below event log for reference.

Application: xxxxxxx.exe
Framework Version: v1.0.0
Description: The process was terminated due to an unhandled exception.
Exception Info: System.UnauthorizedAccessException
   at System.IO.__Error.WinIOError(Int32, System.String)
   at System.IO.FileStream.Init(System.String, System.IO.FileMode, System.IO.FileAccess, Int32, Boolean, System.IO.FileShare, Int32, System.IO.FileOptions, SECURITY_ATTRIBUTES, System.String, Boolean, Boolean, Boolean)
   at System.IO.FileStream..ctor(System.String, System.IO.FileMode, System.IO.FileAccess, System.IO.FileShare, Int32, System.IO.FileOptions, System.String, Boolean, Boolean, Boolean)
   at System.IO.StreamWriter.CreateFile(System.String, Boolean, Boolean)
   at System.IO.StreamWriter..ctor(System.String, Boolean, System.Text.Encoding, Int32, Boolean)
   at System.IO.StreamWriter..ctor(System.String, Boolean)
   at System.IO.File.AppendText(System.String)

Answer 1

Don't try to write where applications should not write. Use other folders like for example:

Environment.GetFolderPath(Environment.SpecialFolder.ApplicationData)

If there is no possible alternative, which I seriously doubt, run the executable with administrative privileges.

https://msdn.microsoft.com/en-us/library/bb756929.aspx