代码中无法访问app.config中的BasicHttpBinding

我使用服务引用从Visual Studio C#项目连接到几个web服务。其中两个服务引用已经创建并正常工作，其中一个需要花费大量精力才能导入，现在似乎不起作用。

我认为问题出在app.config文件中，因为当我尝试创建客户端时，它出现了"找不到端点元素"错误。

这是app.config

<?xml version="1.0" encoding="utf-8" ?>
<configuration>
    <configSections>
    </configSections>
    <system.serviceModel>
        <bindings>
            <basicHttpBinding>
                <binding name="RateQuoteSoap">
                    <security mode="Transport" />
                </binding>
                <binding name="RateQuoteSoap1" />
                <binding name="QuoteSoap" />
                <binding name="WebservicePrimusSoapBinding" />
            </basicHttpBinding>
            <customBinding>
                <binding name="QuoteSoap12">
                    <textMessageEncoding messageVersion="Soap12" />
                    <httpTransport />
                </binding>
            </customBinding>
        </bindings>
        <client>
            <endpoint
                address="https://webservices.rrts.com/rating/ratequote.asmx"
                binding="basicHttpBinding"
                bindingConfiguration="RateQuoteSoap"
                contract="RoadRunnerService.RateQuoteSoap"
                name="RateQuoteSoap" />
            <endpoint
                address="http://services.echo.com/Quote.asmx"
                binding="basicHttpBinding"
                bindingConfiguration="QuoteSoap"
                contract="EchoService.QuoteSoap"
                name="QuoteSoap" />
            <endpoint
                address="http://services.echo.com/Quote.asmx"
                binding="customBinding"
                bindingConfiguration="QuoteSoap12"
                contract="EchoService.QuoteSoap"
                name="QuoteSoap12" />
            <endpoint
                address="http://api.shipprimus.com/"
                binding="basicHttpBinding"
                bindingConfiguration="WebservicePrimusSoapBinding"
                contract="PrimusService.WebservicePrimusServicePort"
                name="WebservicePrimusServicePort" />
        </client>
    </system.serviceModel>
</configuration>

PrimusService是一个工作不正常的服务，当我尝试像WebservicePrimusServicePortClient serviceClient = new WebservicePrimusServicePortClient("WebservicePrimusServicePort");那样初始化客户端时，完全错误是

System.InvalidOperationException: Could not find endpoint element with name 'WebservicePrimusServicePort' and contract 'PrimusService.WebservicePrimusServicePort'in the ServiceModel client configuration section. This might be because no configuration file was found for your application, or because no endpoint element matching this name could be found in the client element.

我还尝试过简单地使用绑定名称和端点名称初始化BasicHttpBinding对象，但没有成功（为了可读性，请使用简短的变量名称）

BasicHttpBinding a = new BasicHttpBinding("QuoteSoap"); // Works fine
BasicHttpBinding b = new BasicHttpBinding("WebservicePrimusSoapBinding"); // Fails
BasicHttpBinding c = new BasicHttpBinding("WebservicePrimusServicePort"); // Fails

它没有为绑定a抛出错误，但绑定b和c失败，并出现错误：

System.Collections.Generic.KeyNotFoundException: No elements matching the key 'WebservicePrimusSoapBinding' were found in the configuration element collection.

BasicHttpBinding binding = new BasicHttpBinding();
binding.Name = "PrimusServiceBinding"; // Completely Unnecessary

EndpointAddress endpoint = new EndpointAddress("http://api.shipprimus.com/");