Static class for Token Cache implementation for WPF Application

TokenCacheHelper.cs

static class TokenCacheHelper
{
    /// <summary>
    /// Path to the token cache
    /// </summary>
    public static readonly string CacheFilePath = System.Reflection.Assembly.GetExecutingAssembly().Location + ".msalcache.bin";

    private static readonly object FileLock = new object();

    public static void BeforeAccessNotification(TokenCacheNotificationArgs args)
    {
        lock (FileLock)
        {
            args.TokenCache.DeserializeMsalV3(File.Exists(CacheFilePath)
                ? ProtectedData.Unprotect(File.ReadAllBytes(CacheFilePath),
                                          null,
                                          DataProtectionScope.CurrentUser)
                : null);
        }
    }

    public static void AfterAccessNotification(TokenCacheNotificationArgs args)
    {
        // if the access operation resulted in a cache update
        if (args.HasStateChanged)
        {
            lock (FileLock)
            {
                // reflect changesgs in the persistent store
                File.WriteAllBytes(CacheFilePath,
                                   ProtectedData.Protect(args.TokenCache.SerializeMsalV3(),
                                                         null,
                                                         DataProtectionScope.CurrentUser));
            }
        }
    }

    internal static void Bind(ITokenCache tokenCache)
    {
        tokenCache.SetBeforeAccess(BeforeAccessNotification);
        tokenCache.SetAfterAccess(AfterAccessNotification);
    }
}