从端点获取的wsdl无效。

<xs:element name="TestResponse">
  <xs:element minOccurs="0" maxOccurs="1" name="TestResult" type="xs:string"/>          
</xs:element>

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应该是

<xs:element name="TestResponse">
    <xs:complexType>
        <xs:sequence>
            <xs:element minOccurs="0" maxOccurs="1" name="TestResult" type="xs:string"/>
        </xs:sequence>
    </xs:complexType>
</xs:element>

型
同样的

<xs:element name="GetRateResponse">
    <xs:element minOccurs="0" maxOccurs="1" name="GetRateResult" type="tns:CARateResponseCollection"/>
</xs:element>

型
还

<wsdl:message name="ISoapService_Test_OutputMessage">
    <wsdl:part name="parameters" element="tns:String"/>
</wsdl:message>

型
应该是

<wsdl:message name="ISoapService_Test_OutputMessage">
  <wsdl:part name="parameters" element="tns:TestResponse"/>
</wsdl:message>

型
最后

<wsdl:message name="ISoapService_GetRate_OutputMessage">
    <wsdl:part name="parameters" element="tns:CARateResponseCollection"/>
</wsdl:message>

型
必须是

<wsdl:message name="ISoapService_GetRate_OutputMessage">
        <wsdl:part name="parameters" element="tns:GetRateResponse/>
</wsdl:message>

型

下面是我使用@Rihab Berrich的代码。我不记得到底是什么问题，但希望这将有助于你和其他人谁绊倒在这一点上。

string apiParams = $"?address={AddressLine1.Replace(' ', '+')}&city={City.Replace(' ', '+')}&zip={PostalCode.Replace(' ', '+')}";
string endPoint = $"https://services.maps.cdtfa.ca.gov/api/taxrate/GetRateByAddress{apiParams}";
RestClient client = new(endPoint) { Timeout = 30000 };

RestRequest request = new();
request.AddHeader("Cookie", "TiPMix=28.368612388085868; x-ms-routing-name=self");
IRestResponse response = client.Execute(request);
CATax cATax = JsonConvert.DeserializeObject<CATax>(response.Content);

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下面是CATax数据模型类

public class CATaxModel
{
    public class CATax
    {
        public Taxrateinfo[] TaxRateInfo { get; set; }
        public Geocodeinfo GeocodeInfo { get; set; }
        public string TermsOfUse { get; set; }
        public string Disclaimer { get; set; }
    }

    public class Geocodeinfo
    {
        public string[] MatchCodes { get; set; }
        public string FormattedAddress { get; set; }
        public string Confidence { get; set; }
        public string CalcMethod { get; set; }
        public int BufferDistance { get; set; }
    }

    public class Taxrateinfo
    {
        public decimal Rate { get; set; }
        public string Jurisdiction { get; set; }
        public string City { get; set; }
        public string County { get; set; }
        public string Tac { get; set; }
    }
}

型