Dotnet Source Gen Options Validation

For each options class, create a partial validator class:

[OptionsValidator]
public partial class Validate{OptionsClassName} : IValidateOptions<{OptionsClassName}>
{
}

• Place the validator in the same namespace as the options class
• The source generator will implement the validation logic at compile time

Register the validator in DI:

services.AddSingleton<IValidateOptions<MyOptions>, ValidateMyOptions>();

• Replace any existing ValidateDataAnnotations() calls
• Ensure Microsoft.Extensions.Options using directive is present

Verify with build:

dotnet build

If build fails, check for:

• Missing partial keyword on validator class
• Unsupported validation attributes
• Missing package reference to Microsoft.Extensions.Options

Report results:

• List all validator classes created
• List all DI registrations added
• Confirm build status