I've got an Excel file from which I have to read out data to an object to serialize. So far I came up with this solution, I'm curious if there are any clearer solutions?

    public myClassFromXsd excelToMyClassFromXsd(String excelFile)
                {
                    Excel.Application excelApp = new Excel.Application();            
                    Excel.Workbook workBook = excelApp.Workbooks.Open(excelFile);
                    Excel.Worksheet workSheet = (Excel.Worksheet)workBook.Sheets[1];
                        
                    myClassFromXsd spec = new myClassFromXsd();
                    UserHeader user = new UserHeader();
                    ResultHeader header = new ResultHeader();
                    anotherClassFromXsd specOp = new anotherClassFromXsd();
                    List<anotherClassFromXsd> specOpList = new List<anotherClassFromXsd>();
                    thisIsAClassToo tcd = new thisIsAClassToo();            
        
                    excelApp.Visible = false;            
        
                    tcd.orderNumber = Convert.ToString(workSheet.get_Range("B3").Value); 
                    switch (((String)workSheet.get_Range("B4").Value).ToUpper())
                    {
                        case "I":
                            tcd.typeOfThis = EnumFromXsd.I;
                            break;
                        case "E":
                            tcd.typeOfThis = EnumFromXsd.E;
                            break;
                        case "D":
                            tcd.typeOfThis = EnumFromXsd.D;
                            break;
                        default:
                            break;
                    }
                    switch (((String)workSheet.get_Range("B5").Value).ToUpper())
                    {
                        case "I":
                            tcd.othersCanAlter = true;
                            break;
                        case "N":
                            tcd.othersCanAlter = false;
                            break;                
                        default:
                            break;
                    }
                    tcd.oneProperty = Convert.ToString(workSheet.get_Range("B6").Value);
                    tcd.onePropertyText = Convert.ToString(workSheet.get_Range("B7").Value);
                    tcd.Name = Convert.ToString(workSheet.get_Range("B10").Value);
                    tcd.vatNum = Convert.ToString(workSheet.get_Range("B11").Value);
                    tcd.city = Convert.ToString(workSheet.get_Range("B12").Value);                  
        
                    
                    specOp.index = 1;
                    specOp.operation = Operation.create;
                    specOp.Item = tcd;
                    specOpList.Add(specOp);    
                    
                    header.requestId = Guid.NewGuid().ToString(); 
                    header.timestamp = DateTime.Now.ToString("yyyy-mm-ddTH:mm:sszzz");              
                        
                    
                    user.user = "TestUser";
                    user.passwordHash = "BA32521232AED23798735C78739273GDHS238238723";
    				
                    spec.header = header;
                    spec.user = user;
                    spec.specOps = specOpList;
        
                    excelApp.Quit();
                    return spec;
                }       

And the serializer and deserializer methods: 

    public void serializeXml(myClassFromXsd mcfx)
            {
                using (StreamWriter writer = new StreamWriter("e:\\test.xml", false))
                {
    
                    XmlSerializer serializer = new XmlSerializer(typeof(myClassFromXsd));
                    serializer.Serialize(writer, mcfx);
                }
            }
    
            public myClassFromXsd deserializeXml(String xmlFile)
            {
                myClassFromXsd mcfx = new myClassFromXsd();
                XmlSerializer serializer = new XmlSerializer(typeof(myClassFromXsd));
                StreamReader reader = new StreamReader(xmlFile);
                mcfx = (myClassFromXsd)serializer.Deserialize(reader);
                reader.Close();
                return mcfx;
            }