.Net 10 Web API performance metrics and features

.NET 10 demonstrates significant performance improvements over .NET 8, achieving 15% faster throughput and using 93% less memory, as showcased in the TechEmpower Benchmarks from .NET Conf 2025.

Implementing Rate Limiting in .NET Web API: Effectively manage and optimize API traffic flow by utilizing a fixed window limiter to prevent overload and maintain stability.

.NET 10 Minimal API Validation

Automatic validation in .NET 10 minimal APIs can enhance the robustness of your application by ensuring that incoming requests meet specified criteria before processing. This can be achieved through model validation and middleware. Below are some key points to consider:

1. Model Validation

Using data annotations, you can define validation rules directly in your model classes. For example:

public class User
{
    [Required]
    [StringLength(100)]
    public string Name { get; set; }

    [EmailAddress]
    public string Email { get; set; }
}

2. Setting Up Minimal API

To set up a minimal API with validation, you can define your endpoints as follows:

var builder = WebApplication.CreateBuilder(args);
var app = builder.Build();

app.MapPost("/users", (User user) =>
{
    // Your logic here
}).Validate(); // Automatically validates the User model

app.Run();

3. Automatic Validation Middleware

To implement automatic validation, you can create a middleware to handle validation errors:

app.Use(async (context, next) =>
{
    await next();

    if (context.Response.StatusCode == StatusCodes.Status400BadRequest)
    {
        // Handle validation errors
        var errors = context.Items["ValidationErrors"];
        await context.Response.WriteAsJsonAsync(errors);
    }
});

4. Custom Validation Attributes

You can also create custom validation attributes for more complex validation scenarios:

public class CustomValidationAttribute : ValidationAttribute
{
    protected override ValidationResult IsValid(object value, ValidationContext validationContext)
    {
        // Custom validation logic
        return ValidationResult.Success;
    }
}

5. Testing Validation

Ensure to test your validation logic by sending requests with both valid and invalid data to verify that your API behaves as expected.

Conclusion

Implementing automatic validation in .NET 10 minimal APIs improves data integrity and user experience by providing immediate feedback on input errors. By leveraging model validation, middleware, and custom attributes, you can create a robust API that efficiently handles validation.