public static void Main(string[] args)
{
    printAllPublicPropertiesInCurrentAppDomain(typeof(string));
}

private static void printAllPublicPropertiesInCurrentAppDomain(Type typeToFind)
{
    foreach (Assembly assembly in AppDomain.CurrentDomain.GetAssemblies())
    {
        foreach (Type type in assembly.GetTypes())
        {
            foreach (PropertyInfo info in type.GetProperties())
            {
                if (info.PropertyType == typeToFind)
                {
                    Console.WriteLine("Assembly: {0}, Type: {1}, Property: {2}", assembly.GetName().Name, type.Name, info.Name);
                }
            }
        }
    }
}

type.GetProperties(BindingFlags.Instance | BindingFlags.Static | BindingFlags.Public | BindingFlags.NonPublic)