Using DateTimeOffset.UtcNow is recommended over DateTime.Now to avoid time zone issues and improve testability.Global query filters in Entity Framework Core can help eliminate repetitive Where statements in LINQ queries.Concurrent collections are recommended for multi-threaded applications to ensure thread safety and better performance.Managing user secrets using Visual Studio's secret manager tool provides a secure way to store sensitive information.The secret manager tool stores secrets in a separate JSON file during development, enhancing security.Base64Url is a helper that makes converting strings to URL-friendly Base64 format easy and efficient.For production environments, override the configuration to use secure providers like Azure Key Vault or AWS Secrets Manager.Avoid storing production secrets in easily accessible files like appsettings.production.json for enhanced security.Base64Url provides a simpler way to handle Base64 encoding for URL-friendly strings, ensuring compatibility.The article provides practical examples and tips to enhance development practices in C# and .NET programming.