System.Runtime.Serialization.CodeGenerator.Dec C# (CSharp) Method

        internal void Dec(object var)
        {
            Load(var);
            Load(1);
            Subtract();
            Store(var);
        }

 private void HandleUnexpectedItemInCollection(LocalBuilder iterator)
 {
     IsStartElement();
     _ilg.If();
     _ilg.Call(_contextArg, XmlFormatGeneratorStatics.SkipUnknownElementMethod, _xmlReaderArg);
     _ilg.Dec(iterator);
     _ilg.Else();
     ThrowUnexpectedStateException(XmlNodeType.Element);
     _ilg.EndIf();
 }