要进行 XML 序列化，从 IEnumerable 继承的类型必须在其继承的所有级别都实现 ADD(System.Object) h

如何解决要进行 XML 序列化，从 IEnumerable 继承的类型必须在其继承的所有级别都实现 ADD(System.Object) h

我是 C# 新手，一直在修改前任员工编写的一些代码。如果我理解正确，并且我确定我没有理解，我需要向 MachineInfoClass 添加一个 Add 方法。它似乎已经接近尾声了。也许它的方法的范围不是公开的？非常感谢这位绿色 C# 程序员的帮助。

namespace AIMS_CMM_Calibration_Reporter
{
    using System;
    using System.Collections;
    using System.Collections.Generic;

    /// <summary>
    /// Class to describe information related the CMM that was calibrated
    /// </summary>
    public class MachineInfoClass:IEnumerator,IEnumerable
    {

        public MachineInfoClass()
        {`enter code here`
            //default empty constructor
        }

        public string SerialNumber { get; set; }
        public string ModelNumber { get; set; }
        public string YearBuilt { get; set; }

        //private double _measUncertMicrons = 0.1;
        //public double MeasUncertMicrons
        //{
        //    get { return _measUncertMicrons; }
        //    set
        //    {//TODO: Measurement Uncertainty maths
        //        _measUncertMicrons = value;
        //        double linearUncert = Math.Round(_measUncertMicrons + (1000 / 250),1);
        //        double volumnUncert = Math.Round(linearUncert * 2,1);
        //        _measUncertCalcText = "MPE = " + _measUncertMicrons.ToString() + " um +( L / 250.0 mm) um  Value outside maximum limit (Linear/Volumetric uncertainty to 1000mm " + linearUncert.ToString() + "um/ " + volumnUncert.ToString() + "um)";
        //    }
        //}

        //private string _measUncertCalcText = string.Empty;
        public string MeasUncertText { get; set; } = string.Empty;
        //{
        //    get { return _measUncertCalcText; }
        //}

        public string MachinePerformanceSpec { get; set; } = string.Empty;

        public MeasurementRange MeasRange { get; set; } = new MeasurementRange();
        public ProbeSystemClass ProbeDetails { get; set; } = new ProbeSystemClass();

        object IEnumerator.Current
        {
            get
            {
                throw new NotImplementedException();
            }
        }

        /// <summary>
        /// Class to describe information related to the CMM capabilities
        /// </summary>
        public class MeasurementRange
        {
            public string MachineUnits { get; set; }
            public string Xrange { get; set; }
            public string Yrange { get; set; }
            public string Zrange { get; set; }
        }

        bool IEnumerator.MoveNext()
        {
            throw new NotImplementedException();
        }

        void IEnumerator.Reset()
        {
            throw new NotImplementedException();
        }

        IEnumerator IEnumerable.GetEnumerator()
        {
            throw new NotImplementedException();
        }

        public static implicit operator MachineInfoClass(List<MachineInfoClass> v)
        {
            throw new NotImplementedException();
        }

        internal void Remove(object item)
        {
            throw new NotImplementedException();
        }
        

        
        internal void Add(MachineInfoClass newCMM)
        {
            throw new NotImplementedException();
        }
    }
}

****这是在 xlmserializer 的 frmMain.CS 中实际弹出错误的地方 ****

 public bool SaveReport(string filePath)
        {
            try
            {
                //load values from the form into the calreport object
                if (!saveValuesintoCalReportObj()) throw new Exception("Form to CalReportObj failed.");
                //save the calibration object data to xml
                XmlWriterSettings ws = new XmlWriterSettings();
                ws.NewLineHandling = NewLineHandling.Entitize; //<-- needed to keep newlines for addresses,etc

                XmlSerializer xSave = new XmlSerializer(typeof(CalibrationReport));
                using (XmlWriter xWrite = XmlWriter.Create(filePath,ws))
                {
                    xSave.Serialize(xWrite,calReport);
                }

                activeReportXMLFilename = filePath;
                this.Text = Application.ProductName + "  ::  " + activeReportXMLFilename;
                updateMRUlist(activeReportXMLFilename);

                return true;
            }
            catch (Exception ex)
            {
                //String innerMessage = (ex.InnerException != null)
                 //     ? ex.InnerException.Message
                 //     : "";
                MessageBox.Show("Failed to serialize and/or save." + Environment.NewLine + Environment.NewLine + ex.Message );
                return false;
            }
        }