调用WebServices传参对方验证为空

.net环境下调用对方WebServices，对方验证一直提示为空。最后看到引用的WebServices有奇怪的东西出现

入下面代码，字段nperprm会对应的有一个 nperprmFieldSpecified

  /// <remarks/>
        [System.Xml.Serialization.XmlElementAttribute(Form=System.Xml.Schema.XmlSchemaForm.Unqualified,Order=10)]
        public double nperprm {
            get {
                return this.nperprmField;
            }
            set {
                this.nperprmField = value;
                this.RaisePropertyChanged("nperprm");
            }
        }
        
        /// <remarks/>
        [System.Xml.Serialization.XmlIgnoreAttribute()]
        public bool nperprmSpecified {
            get {
                return this.nperprmFieldSpecified;
            }
            set {
                this.nperprmFieldSpecified = true;
                this.RaisePropertyChanged("nperprmSpecified");
            }
        }

m.nperprm = 12;
m.nperprmSpecified = true;