xml – Requesting XSD validation failed when using C # Web service

I've added a reference to a Visual Studio 2017 web service with a third-party WSDL. This is the WSDL:



  
    
      
        
          
            
              
                
                  
                    
                      
                        
                      
                    
                  
                  
                    
                      
                        
                      
                    
                  
                  
                    
                      
                        
                      
                    
                  
                
              
            
          
        
      
      
        
          
            
              
                
                  
                  
                    
                      
                        
                        
                        
                        
                        
                        
                        
                        
                        
                        
                        
                        
                        
                        
                        
                        
                        
                        
                        
                        
                        
                        
                        
                        
                        
                      
                    
                  
                  
                    
                      
                        
                        
                        
                        
                        
                        
                        
                        
                        
                        
                        
                        
                        
                        
                        
                        
                        
                        
                        
                        
                        
                        
                        
                        
                        
                        
                        
                        
                          
                            
                              
                              
                              
                              
                              
                              
                              
                              
                              
                              
                              
                              
                              
                              
                            
                          
                        
                        
                          
                            
                              
                              
                              
                              
                              
                              
                              
                              
                              
                              
                              
                              
                              
                              
                              
                              
                              
                              
                            
                          
                        
                        
                          
                            
                              
                              
                              
                              
                              
                              
                              
                              
                            
                          
                        
                        
                          
                            
                              
                                
                                  
                                    
                                    
                                    
                                  
                                
                              
                              
                                
                                  
                                    
                                    
                                    
                                  
                                
                              
                              
                                
                                  
                                    
                                    
                                    
                                  
                                
                              
                            
                          
                        
                        
                          
                            
                              
                              
                            
                          
                        
                        
                      
                    
                  
                  
                    
                      
                        
                      
                    
                  
                
              
            
          
        
      
    
  
  
    
  
  
    
  
  
    
      
      
    
  
  
    
    
      
      
        
      
      
        
      
    
  
  
    
      
    
  

Consumption is formed from a class in C #:

WSDesmaterializado.RequestWSDesmaterializadoReq l_objRequest = new WSDesmaterializado.RequestWSDesmaterializadoReq();
            WSDesmaterializado.ResponseWSDesmaterializadoResp l_objResponse = new WSDesmaterializado.ResponseWSDesmaterializadoResp();
            WSDesmaterializado.SIOTypeClient l_objConsulta = new WSDesmaterializado.SIOTypeClient();

            l_objRequest.NumeroSolicitud = p_strNumSolicitud;
            l_objRequest.NumeroID = p_intID;
            l_objRequest.TipoID = p_intTipoID;

            try
            {
                l_objResponse = l_objConsulta.WSDesmaterializado(l_objRequest);
                if (l_objResponse != null)
                {
                    if(l_objResponse.respuesta == 1)
                    {
                        p_strNombreCliente = l_objResponse.Cliente(0).PrimerNombre + " " + l_objResponse.Cliente(0).SegundoNombre + 
                            " " + l_objResponse.Cliente(0).PrimerApellido + " " + l_objResponse.Cliente(0).SegundoApellido;
                        return true;
                    }
                    else
                    {
                        return false;
                    }
                }
                else
                {
                    return false;
                }
            }
            catch (Exception p_objException)
            {
                throw p_objException;
            }

Running WS Consumption generates an xsd validation error:

VR004 – xsd request validation failed (1: 219) cvc-complex-type.2.4.a: Invalid content was found starting with
Element & # 39; soap: body & # 39 ;. One of
& # 39; { "http://schemas.xmlsoap.org/soap/envelope/": header} & # 39; is expected.

When consumed via SoapUI, the service responds, but if it does through the C # project, it will not respond as expected.
I've added the reference to the service as a service reference, as a Web reference I've changed the WSDL with several solutions found on the Web, but still do not get the expected result.

Thank you in advance for your help.