Interface helpers

Helpers.cs

public static class Helpers
{


    /// <summary>
    /// Retrieves the names of all entities that implement a specified interface type.
    /// </summary>
    /// <typeparam name="T">
    /// The interface type to search for. Must be a class type and an interface.
    /// </typeparam>
    /// <returns>
    /// A list of strings representing the names of all entities that implement the specified interface.
    /// </returns>
    /// <exception cref="ArgumentException">
    /// Thrown when the specified type <typeparamref name="T"/> is not an interface.
    /// </exception>
    public static List<string> GetAllEntityNames<T>() where T : class
    {
        if (!typeof(T).IsInterface)
            throw new ArgumentException("T must be an interface.");

        return Enumerable
            .Select<Type, string>(GetAllEntities<T>(), x => x.Name)
            .ToList();
    }

    /// <summary>
    /// Retrieves all types that implement a specified interface type.
    /// </summary>
    /// <typeparam name="T">
    /// The interface type to search for. Must be a class type and an interface.
    /// </typeparam>
    /// <returns>
    /// A list of <see cref="Type"/> objects representing all types that implement the specified interface.
    /// </returns>
    /// <exception cref="ArgumentException">
    /// Thrown when the specified type <typeparamref name="T"/> is not an interface.
    /// </exception>
    public static List<Type> GetAllEntities<T>() where T : class
    {
        if (!typeof(T).IsInterface)
            throw new ArgumentException("T must be an interface.");

        return AppDomain.CurrentDomain.GetAssemblies()
            .SelectMany(x => x.GetTypes())
            .Where(x => typeof(T).IsAssignableFrom(x) && !x.IsInterface && !x.IsAbstract)
            .ToList();
    }

}