<Items>
     <Item ID="1">
         <Name>Камень</Name>
  </Item>
     <Item ID="2">
         <Name>Куб</Name>
         <Amount>1</Amount>
         <SizeX>1</SizeX>
         <SizeY>1</SizeY>
  <SizeZ>1</SizeZ>
  <WeightInKG>10</WeightInKG>
     </Item>
</Items>

         <Name>Куб</Name>
         <Amount>1</Amount>
         <SizeX>1</SizeX>
         <SizeY>1</SizeY>
  <SizeZ>1</SizeZ>
  <WeightInKG>10</WeightInKG>

         string strFilename = "Assets/Scripts/My_Inventory/Items.xml";
         XmlDocument xmlDoc = new XmlDocument();
         xmlDoc.Load(strFilename);
         XmlNodeList xnList = xmlDoc.SelectNodes("/Items/Item1");
         foreach (XmlNode xn in xnList)
         {
             Debug.Log(xn["Name"].InnerText);
             Debug.Log(xn["Amount"].InnerText);
             Debug.Log(xn["SizeX"].InnerText);
             Debug.Log(xn["SizeY"].InnerText);
             Debug.Log(xn["SizeZ"].InnerText);
             Debug.Log(xn["WeightInKG"].InnerText);
         }