NotImplementedException does not implement this method or operation, notimplemented

NotImplementedException does not implement this method or operation, notimplemented

When you use DevExpress to bind DataSource to the control CheckedListBoxControl, an exception "NotImplementedException does not implement this method or operation" is thrown. The Code is as follows:

this.checkedListBoxControl.DataSource = DataAccess.BaseInfoDataAccess.Sites.Where(v => v.Site==1); this.checkedListBoxControl.ValueMember = "Site"; this.checkedListBoxControl.DisplayMember = "SiteName";

After adding ToList () to Where, solve the problem.

this.checkedListBoxControl.DataSource = DataAccess.BaseInfoDataAccess.Sites.Where(v => v.Site==1).ToList();

　　

An exception of the "SystemNotImplementedException" type occurs in DangHongTVNettiersDataSqlClientDLL.

Printf ("\ t \ t1. Enter the Student Score record");/* Enter the Student Score record */
Printf ("\ t \ t2. Print the record \ n");/* display */
Printf ("\ t \ t3. Search for Search record on name \ n");/* Search */
Printf ("\ t \ t4. Delete a record \ n");/* Delete */
Printf ("\ t \ t5. Sort to make New a file \ n");/* Sort */
Printf ("\ t \ t6. Insert record to list \ n");/* Insert */
Printf ("\ t \ t7. Save the file \ n");/* Save */
Printf ("\ t \ t8. read Load the file \ n");/* read */
Printf ("\ t \ t9. Quit \ n");/* exit */

Throw new SystemNotImplementedException ();

Is the exception that occurs when there is no method to implement the interface or abstract class requirements
For example:
Interface abc {int ();}

Public class d: abc {
Int a () {throw new System. NotImplementedException ();}
}

This exception is generally not thrown when the code is not written.
It does not have much effect. You can also change it to Exception to write the error messages you want to bring up:
Public class d: abc {
Int a () {throw new Exception (