private LuaInternalException(LuaInternalException ex)
     : base(_Message, ex)
 {
     this.L       = ex.L;
     this.ErrCode = ex.ErrCode;
 }
 private LuaInternalException(lua.State L, LUA.ERR errcode)
     : base(_Message)
 {
     this.L       = L;
     this.ErrCode = errcode;
 }