c# - LINQ to JSON - 異なる配列からリストを設定する

Question

ポリモーフィック json 文字列があります。外観は次のとおりです。

{
    "Product" : {
        "Context" : {
            "IssuerDetails" : {
                "Issuer" : {
                    "@clientCode" : "BMTEST-CA",
                    "@companyName" : "zTest BM Company, Inc",
                    "@companyId" : "1",
                    "IssuerChanges" : [{
                            "@type" : "Book Value",
                            "@previous" : "$9.06",
                            "@current" : "$55.34"
                        }, {
                            "@type" : "Price Target",
                            "@previous" : "$50.00",
                            "@current" : "$199.00"
                        }, {
                            "@type" : "EPS",
                            "@previous" : "2.10",
                            "@current" : "2.09",
                            "@period" : "5",
                            "@year" : "2017"
                        }, {
                            "@type" : "Income Tax",
                            "@previous" : "56",
                            "@current" : "55",
                            "@period" : "5",
                            "@year" : "2015"
                        }
                    ],
                    "SecurityDetails" : {
                        "Security" : {
                            "@primaryIndicator" : "Yes",
                            "Clusters" : [{
                                    "@name" : "Company Data",
                                    "@rank" : "2",
                                    "FinancialValue" : [{
                                            "@financialsType" : "Dividend",
                                            "CurrentValue" : {
                                                "@displayValue" : "$5.02",
                                            }
                                        }, {
                                            "@financialsType" : "Book Value",
                                            "CurrentValue" : {
                                                "@displayValue" : "$55.34",
                                            },
                                            "PreviousValue" : {
                                                "@displayValue" : "$9.06",
                                                "@type" : "INCREASE",
                                            }
                                        }
                                    ]
                                }, {
                                    "@rank" : "1",
                                    "@name" : "AAPL & Market Data",
                                    "FinancialValue" : [{
                                            "@financialsType" : "Rating",
                                            "@shortCode" : "Mkt",
                                            "CurrentValue" : {
                                                "@displayValue" : "Market Perform",
                                            }
                                        }, {
                                            "@financialsType" : "Rating Qualifier",
                                            "CurrentValue" : {
                                                "@displayValue" : "Speculative",
                                            }
                                        }
                                    ]
                                }
                            ]
                        }
                    }
                }
            }
        }
    }
}

次の拡張クラスを使用しています。

public static class JsonExtensions
{
    public static IEnumerable<JObject> ObjectsOrSelf(this JToken root)
    {
        if (root is JObject)
            yield return (JObject)root;
        else if (root is JContainer)
            foreach (var item in ((JContainer)root).Children())
                foreach (var child in item.ObjectsOrSelf())
                    yield return child;
        else
            yield break;
    }
}

それに基づいて、ここに私のクエリがあります：

JObject feed = JObject.Parse(jsonText);

var compInfo = from issuer in feed.SelectTokens("Product.Context.IssuerDetails.Issuer").SelectMany(i => i.ObjectsOrSelf())
       let issuerChanges = issuer.SelectTokens("IssuerChanges").SelectMany(s => s.ObjectsOrSelf())
       where issuerChanges != null 
       let finValues = issuer.SelectTokens("SecurityDetails.Security.Clusters").SelectMany(s => s.ObjectsOrSelf())
       where finValues != null
       select new
        {
           Id = (int)issuer["@companyId"], 
           BMOTicker = (string)issuer["@clientCode"],
           CompName = (string)issuer["@companyName"],
           ChngsType = issuerChanges.Select(c => (string)c["@type"]),
           PrevChng = issuerChanges.Select(c => (string)c["@previous"]),
           CurrChng = issuerChanges.Select(c => (string)c["@current"]),
           Period = issuerChanges.Select(c => (string)c["@period"]),
           Year = issuerChanges.Select(c => (string)c["@year"]),
           FinValueName = finValues.Select(c => (string)c["@financialsType"])
    };

クエリを実行すると、エラーは発生しませんが、次のようになります (LinqPad から)。

最終結果は次のようになります (Excel でシミュレート)。

どうすれば最終結果を得ることができますか？