c＃BindingList只读错误

我一直在努力寻找问题的可能原因，但我似乎无法找到它：

错误：

System.NotSupportedException：Collection是只读的。 System.ThrowHelper.ThrowNotSupportedException（ExceptionResource资源）位于C：\ Users \ aRJiJon \ Documents \ Visual中WindowsFormsApplication1.Form1.Btn_CSVSEATINGPLAN_Click（Object sender，EventArgs e）的System.Collections.ObjectModel.Collection`1.Add（T item） Studio 2010 \ Projects \ WindowsFormsApplication_1 \ WindowsFormsApplication1 \ Form1.cs：第72行

this.dataGridView1.DefaultCellStyle.Font = new Font("Tahoma", 11); bindingCSVSP.DataSource = CSV_Seating_Plan; bindingCSVSP.AllowNew = true; CSV_Seating_Plan.AllowNew = true; CSV_Seating_Plan.AllowRemove = true; CSV_Seating_Plan.RaiseListChangedEvents = true; CSV_Seating_Plan.AllowEdit = true; this.dataGridView1.DataSource = bindingCSVSP; this.btn_Process_SP.Enabled = true; CSV_Seating_Plan.Add(new csv_SeatingPlan()); public string examperiod; [FieldConverter(ConverterKind.Date, "dd/mm/yyyy")] public DateTime date_Exam; public string time; public string exam_Code; public string id_Student; public string name_Student; public string candidatenum_Student; public string seat_num; public string _WSS_EXEC; public string exam_loc; #region getsetmethods. public string EXAMPERIOD { get { return this.examperiod; } } public DateTime DATE_TIME { get { return this.date_Exam; } } public string TIME { get { return this.time; } } public string EXAM_CODE { get { return this.exam_Code; } } public string ID_STUDENT { get { return this.id_Student; } } public string NAME_STUDENT { get { return this.name_Student; } } public string CANDIDATE_NUMBER { get { return this.candidatenum_Student; } } public string SEAT_NUM { get { return this.seat_num; } } public string WSS_EXEC { get { return this._WSS_EXEC; } } public string EXAM_LOC { get { return this.exam_loc; } } #endregion public csv_SeatingPlan() { } 

谁能告诉我我错过了什么？

Answer 1

这意味着IList for the generic collection class的底层实现对IsReadOnly属性返回true。