NetworkTool/windows/NetworkTool.Client/Services/PasswordStoreService.cs

using Microsoft.Win32;

namespace NetworkTool.Client.Services;

public sealed class PasswordStoreService
{
    private const string RegistryPath = @"Software\NetworkTool";
    private const string ValueName = "SavedPassword";

    public string LoadPassword()
    {
        using var key = Registry.CurrentUser.OpenSubKey(RegistryPath, writable: false);
        return key?.GetValue(ValueName) as string ?? string.Empty;
    }

    public void SavePassword(string password)
    {
        using var key = Registry.CurrentUser.CreateSubKey(RegistryPath);
        key.SetValue(ValueName, password, RegistryValueKind.String);
    }

    public void ClearPassword()
    {
        using var key = Registry.CurrentUser.OpenSubKey(RegistryPath, writable: true);
        key?.DeleteValue(ValueName, throwOnMissingValue: false);
    }
}