Error on Web Service request: The top XML element 'parameters' from namespace '' references distinct types

Question

I have the following service interface that I have imported using the Visual Studio tool (it is a WCF Web Service).

Reference.cs

But when I try to consume the service AuthenticateJAAS (execute the web service), I get the following error:

InvalidOperationException: The top XML element 'parameters' from namespace '' references distinct types XAFProject.Module.WS.MCWFUsers.mcwfUsersGetUserGroupsIn and XAFProject.Module.WS.MCWFUsers.mcwfUsersAuthenticateJAASIn. Use XML attributes to specify another XML name or namespace for the element or types.

I cannot change the namespace or the element name 'parameters', as it is from a WSDL that cannot be changed (third party). When I remove the class GetUserGroupsRequest and related content from the Reference.cs, I can consume the web service AuthenticateJAAS without problems. The generated XML is:

<s:Envelope xmlns:s="http://schemas.xmlsoap.org/soap/envelope/">
  <s:Body xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema">
    <AuthenticateJAAS xmlns="http://services.senior.com.br">
      <user xmlns=""/>
      <password xmlns=""/>
      <encryption xmlns="">0</encryption>
      <parameters xmlns="">
        <flowInstanceID xsi:nil="true"/>
        <flowName xsi:nil="true"/>
        <pmUserName>******</pmUserName>
        <pmUserPassword>******</pmUserPassword>
      </parameters>
    </AuthenticateJAAS>
  </s:Body>
</s:Envelope>

Is there a way to use both methods/services (AuthenticateJAAS + GetUserGroupsRequest) without any error? I was thinking that maybe, if I use namespace prefixes, I could manage to use both services, I think.

Here is the part of the code that I initialize the client and execute the service:

sapiens_SyncMCWFUsersClient mCWFUsersClient = new sapiens_SyncMCWFUsersClient(); 
mcwfUsersAuthenticateJAASIn parameters = new mcwfUsersAuthenticateJAASIn();
parametrosEntrada.pmUserName = "******";
parametrosEntrada.pmUserPassword = "******";
parametrosEntrada.pmEncrypted = 0;
AuthenticateJAASRequest request = new AuthenticateJAASRequest("", "", 0, parameters); 
AuthenticateJAASResponse response = mCWFUsersClient.AuthenticateJAAS(request);

Answer 1

So far, I solved my problem by doing the following in the Reference.cs file. [System.ServiceModel.MessageBodyMemberAttribute(Namespace= "", Order=3, Name = "parameters")] . Then, I changed the field name to anything but "parameter". In this case public MCWFUsers.mcwfUsersGetUserGroupsIn parametersGetUserGroups; That means that this will not reference distinct types inside cs file.

I changed this:

 [System.Diagnostics.DebuggerStepThroughAttribute()]
    [System.CodeDom.Compiler.GeneratedCodeAttribute("Microsoft.Tools.ServiceModel.Svcutil", "2.0.3")]
    [System.ServiceModel.MessageContractAttribute(WrapperName="GetUserGroups", WrapperNamespace="http://services.senior.com.br", IsWrapped=true)]
    public partial class GetUserGroupsRequest
    {
        
        [System.ServiceModel.MessageBodyMemberAttribute(Namespace= "", Order=0)]
        public string user;
        
        [System.ServiceModel.MessageBodyMemberAttribute(Namespace= "", Order=1)]
        public string password;
        
        [System.ServiceModel.MessageBodyMemberAttribute(Namespace= "", Order=2)]
        public int encryption;
        
        [System.ServiceModel.MessageBodyMemberAttribute(Namespace= "", Order=3)]
        public MCWFUsers.mcwfUsersGetUserGroupsIn parameters;
        
        public GetUserGroupsRequest()
        {
        }
        
        public GetUserGroupsRequest(string user, string password, int encryption, MCWFUsers.mcwfUsersGetUserGroupsIn parameters)
        {
            this.user = user;
            this.password = password;
            this.encryption = encryption;
            this.parameters = parameters;
        }
    }

to this

    [System.Diagnostics.DebuggerStepThroughAttribute()]
    [System.CodeDom.Compiler.GeneratedCodeAttribute("Microsoft.Tools.ServiceModel.Svcutil", "2.0.3")]
    [System.ServiceModel.MessageContractAttribute(WrapperName="GetUserGroups", WrapperNamespace="http://services.senior.com.br", IsWrapped=true)]
    public partial class GetUserGroupsRequest
    {
        
        [System.ServiceModel.MessageBodyMemberAttribute(Namespace= "", Order=0)]
        public string user;
        
        [System.ServiceModel.MessageBodyMemberAttribute(Namespace= "", Order=1)]
        public string password;
        
        [System.ServiceModel.MessageBodyMemberAttribute(Namespace= "", Order=2)]
        public int encryption;
        
        [System.ServiceModel.MessageBodyMemberAttribute(Namespace= "", Order=3, Name = "parameters")]
        public MCWFUsers.mcwfUsersGetUserGroupsIn parametersGetUserGroups;
        
        public GetUserGroupsRequest()
        {
        }
        
        public GetUserGroupsRequest(string user, string password, int encryption, MCWFUsers.mcwfUsersGetUserGroupsIn parameters)
        {
            this.user = user;
            this.password = password;
            this.encryption = encryption;
            this.parametersGetUserGroups = parameters;
        }
    }

---

Edit: Nope, that didn't solve it, unfortunately. I will keep trying.