C# 正确格式化json负载

我正试图格式化json负载，但在Params属性中出现语法错误

   mailer.send2(new PayoutEmailModel
                    {
                        medium = "email",
                        name = "sap_finance_supplier_payout",
                        @params = @"{""supplier"":""" + BeneficiaryName + """,""lastfourdigits"":""" + AccountNo + """,""amount"":""" + Amount + """,""valuedate"":""" + BeneficiaryName + """,""time"":""" + BeneficiaryName + """}",
                        recipient = "dapo.olotu@konga.com",
                        sender = "no-reply@konga.com",
                        subject = "Payment Notification",
                        sender_id = "Konga"
                    });

编辑， 我需要@Params正确渲染如下

{"supplier":"foo","lastfourdigits":"foo","amount":"foo","valuedate":"foo","time":"foo"}

---

尝试使用匿名类型

mailer.send2(new PayoutEmailModel
    {
        medium = "email",
        name = "sap_finance_supplier_payout",
        params = new { supplier = BeneficiaryName, lastfourdigits = AccountNo, amount = Amount, valuedate = BeneficiaryName, time = BeneficiaryName},
        recipient = "dapo.olotu@konga.com",
        sender = "no-reply@konga.com",
        subject = "Payment Notification",
        sender_id = "Konga"
    });

---

我认为迪内什是对的，按你的方式做可能不会得到你期望的结果。但是，为了回答您的问题，语法错误是因为您使用每个

+

运算符开始一个新字符串，但没有使用新的

@

前缀：

@“{”“供应商”“：”“+受益人名称+@”“，”“最后四位数”“：”“+AccountNo+@”“，”“金额”“：”“+amount+@”“，”“valuedate”“：”“+受益人名称+@”“，”“时间”“：”“+受益人名称+@”“，”