Fix: Profile file name case insensitive

Author: BornToBeRoot

Source/NETworkManager.Validators/ProfileFileUniqueValidator.cs

@@ -1,4 +1,5 @@
-using System.Globalization;
+using System;
+using System.Globalization;
 using System.Linq;
 using System.Windows.Controls;
 using NETworkManager.Localization.Resources;
@@ -10,7 +11,8 @@ public class ProfileFileUniqueValidator : ValidationRule
 {
     public override ValidationResult Validate(object value, CultureInfo cultureInfo)
     {
-        return ProfileManager.ProfileFiles.Any(x => x.Name == value as string)
+        return ProfileManager.ProfileFiles.Any(x =>
+            string.Equals(x.Name, value as string, StringComparison.OrdinalIgnoreCase))
             ? new ValidationResult(false, Strings.ProfileNameAlreadyExists)
             : ValidationResult.ValidResult;
     }

Website/docs/changelog/next-release.md

@@ -82,6 +82,9 @@ Release date: **xx.xx.2025**
 
 ## Bugfixes
 
+- Fixed an issue where the profile file could be overwritten when creating a new profile file with the same name, but with another case (`Profile` exists, but `profile` is created). [#3087](https://github.com/BornToBeRoot/NETworkManager/pull/3087)
+- Fixed an application crash when a profile file is renamed to another case (e.g. `Profile` to `profile`) [#3087](https://github.com/BornToBeRoot/NETworkManager/pull/3087).
+
 **Network Interface**
 
 - Re-select the network interface after a network change or configuration update. Thanks to [@Ghislain1](https://github.com/Ghislain1) [#3004](https://github.com/BornToBeRoot/NETworkManager/pull/3004) [#2962](https://github.com/BornToBeRoot/NETworkManager/pull/2962)