Why Do I Get UnauthorizedAccessException When My .exe Writes to Program Files?

Troubleshooting UnauthorizedAccessException Errors When Writing to Program Files

Executing an .exe file located within the Program Files directory can trigger a System.UnauthorizedAccessException error. This happens when the application tries to write data to files in that protected directory.

The best solution is to avoid writing to Program Files altogether. Use alternative locations designed for application data, such as:

<code class="language-csharp">Environment.GetFolderPath(Environment.SpecialFolder.ApplicationData)</code>

If redirecting output is not feasible, running your .exe with administrative privileges provides temporary elevated access to Program Files. For details on elevating process privileges, see:

https://www.php.cn/link/1845faa2957cb42b7ddd92b26f114c57

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