dotnet-validation-patterns

Validate .NET configuration options at startup by implementing the IValidateOptions<T> interface. This mechanism ensures your application configuration data integrity is checked securely during initialization, preventing invalid states from running.

The best way to perform cross-property validation in C# is implementing IValidatableObject. This interface enables complex validation rules spanning multiple properties within a single object, ensuring data integrity without external dependencies.

Use DataAnnotations for declarative model validation in C# by adding attributes like [Required], [Range], and [StringLength] to your properties. This approach enforces property-level checks for your models automatically.

Yes, you can validate objects programmatically in .NET by using the Validator.TryValidateObject method. This approach executes validation logic against your models and retrieves validation results without relying on external libraries.

You do not need external libraries for common .NET validation scenarios. Built-in features like DataAnnotations, IValidatableObject, and custom ValidationAttribute authoring provide robust data integrity for models and configurations without extra dependencies.

Create a custom ValidationAttribute in .NET by authoring a class that inherits from ValidationAttribute. This allows you to implement reusable, domain-specific validation logic tailored to your application requirements.