What are some common pitfalls to avoid when implementing GUID activation in a C# program with PHP?

One common pitfall to avoid when implementing GUID activation in a C# program with PHP is not properly handling the conversion between C# GUIDs and PHP strings. To solve this, ensure that you use the correct functions for converting GUIDs in both languages to maintain consistency.

// Convert C# GUID to PHP string
$csharp_guid = "6ba7b810-9dad-11d1-80b4-00c04fd430c8";
$php_guid = strtoupper(str_replace('-', '', $csharp_guid));

// Convert PHP string to C# GUID
$php_guid = "6BA7B810-9DAD-11D1-80B4-00C04FD430C8";
$csharp_guid = substr($php_guid, 0, 8) . '-' . substr($php_guid, 8, 4) . '-' . substr($php_guid, 12, 4) . '-' . substr($php_guid, 16, 4) . '-' . substr($php_guid, 20);