/// <summary>
/// Adds specification of type <typeparamref name="T" />.
/// </summary>
/// <param name="options"></param>
/// <param name="specification">Specification of type <typeparamref name="T" /></param>
/// <typeparam name="T">Specified type.</typeparam>
/// <returns></returns>
/// <exception cref="ArgumentNullException">Thrown if <paramref name="specification" /> is null.</exception>
public static IValidationContextOptions AddSpecification <T>(this IValidationContextOptions options, Specification <T> specification)
where T : class
{
if (specification == null)
{
throw new ArgumentNullException(nameof(specification));
}
return(OptionsUnwrapper.UnwrapSpecifications(options, specifications =>
{
if (specifications.ContainsKey(typeof(T)))
{
specifications[typeof(T)] = specification;
}
else
{
specifications.Add(typeof(T), specification);
}
}));
}
