Convert XML reader.value values to integer

Hi everyone!
 
I am trying to compare XmlTextReader values to determine which is greater in value.
 
This is the code I have so far:
 

int newVersion1 = 0;
            string xmlUrl1 = @"C:\Users\Programming\Desktop\update.xml";
            XmlTextReader reader1 = null;
 
            int newVersion2 = 0;
            string xmlUrl2 = @"C:\Users\Programming\Desktop\update2.xml";
            XmlTextReader reader2 = null;
 
            try
            {
                reader1 = new XmlTextReader(xmlUrl1);
                reader1.MoveToContent();
                string elementName = "";
                if ((reader1.NodeType == XmlNodeType.Element) && (reader1.Name == "sqldbfile"))
                {                    
                    while (reader1.Read())
                    {
                        if (reader1.NodeType == XmlNodeType.Element)
                        {                                                     
                            elementName = reader1.Name;
                        }
                        else
                        {                            
                            if (reader1.NodeType == XmlNodeType.Text)
                            {                                
                                switch (elementName)
                                {
                                    case "version":
                                        newVersion1 = Convert.ToInt32(reader1.Value);
                                        break;                                    
                                }
                            }
                        }
                    }
                }
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message);
            }
            finally
            {
                if (reader1 != null)
                {
                    reader1.Close();
                }
            }
            //////////////////////////////////////////////////////////////////////////////////////
            try
            {
                reader2 = new XmlTextReader(xmlUrl2);
                reader2.MoveToContent();
                string elementName = "";
                if (reader2.NodeType == XmlNodeType.Element)
                {
                    while (reader2.Read())
                    {
                        if ((reader2.NodeType == XmlNodeType.Element) && (reader2.Name == "sqldbfile"))
                        {
                            elementName = reader2.Name;
                        }
                        else
                        {
                            if (reader2.NodeType == XmlNodeType.Text)
                            {
                                switch (elementName)
                                {
                                    case "version":
                                        newVersion2 = Convert.ToInt32(reader2.Value);                                        
                                        break;
                                }
                            }
                        }
                    }
                }
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message);
            }
            finally
            {
                if (reader2 != null)
                {
                    reader2.Close();
                }
            }
 
            //string s1 = reader1.Value;
            //string s2 = reader2.Value;

            MessageBox.Show("reader 1 : " + reader1.Value);
            MessageBox.Show("reader 2 : " + reader2.Value);

Current Output: The MessageBoxes at the bottom are not presenting any output for reader1.value or reader2.value.
 
Intended Output:
The XML files have: 2.0 in each of the 2 files. I am wanting to compare these 2 to determine whether or not a program is up to date. I should be getting values for reader1.value and reader2.value.
 
The error I'm getting is "Input String is not in correct format!" Does anyone know what I'm missing?