WepAPI SpecFlow: checks if input string as JSON of given type matches input table

VerifyJsonContent.cs

///<summary> Checks whether the JSON <paramref name="content"/> as <paramref name="resultType"/> contains the entities described in the given <paramref name="table"/> </summary>
private static string[] VerifyJsonContent(string content, string resultType, Table table)
{
    var matchingTypes = AppDomain.CurrentDomain.GetAssemblies().SelectMany(a => a.GetExportedTypes())
        .Where(t => (t.Namespace + "." + t.Name).EndsWith(resultType)).ToArray();

    if (matchingTypes.Length != 1) return new[] { string.Format("Cannot determine matching type by the name {0}; candidates: [{1}]",
            resultType, string.Join(", ", matchingTypes.Select(t => t.Namespace + "." + t.Name))) };

    object message = null;
    if (!string.IsNullOrEmpty(content))
    {
        if (!content.StartsWith("[")) content = "[" + content + "]";
        message = JsonConvert.DeserializeObject(content, matchingTypes.Single().MakeArrayType());
    }

    var verifier = typeof(CollectionVerifier).GetMethod("For", BindingFlags.Public | BindingFlags.Static)
        .MakeGenericMethod(matchingTypes.Single()).Invoke(null, null);

    Func<DateTime, DateTime, bool> dateCompare = (a, b) => a.Date == b.Date && a.Hour == b.Hour && a.Minute == b.Minute;
    verifier.GetType().GetMethod("WithTypeEqualityComparer", BindingFlags.Public | BindingFlags.Instance)
        .MakeGenericMethod(typeof(DateTime)).Invoke(verifier, new object[] { dateCompare });

    var method = verifier.GetType().GetMethod("IsSubset", BindingFlags.Public | BindingFlags.Instance, null,
        new[] { typeof(IEnumerable<IDictionary<string, string>>), typeof(IEnumerable<>).MakeGenericType(matchingTypes.Single()) }, null);

    return (string[])method.Invoke(verifier, new object[] { table.Rows, message });
}