How to delete a calendar project in SharePoint

It is said that splistitem. Delete cannot be deleted. Even if you do not know how to delete it, you can see the implementation of the system.Code, You need your own friends:

(This code is in the Microsoft. Sharepoint. webcontrols. deleteitembutton class)

Private void Deletefromrecurrenceseries () {If (base. itemcontext. List. basetemplate = splisttemplatetype. Events) | (base. itemcontext. contenttype! = NULL) & base. itemcontext. contenttype. Id. ischildof (spbuiltincontenttypeid. Event) {While (true) {using (ienumerator Enumerator = Base. itemcontext. formcontext. fieldcontrolcollection. getenumerator () {control Control ; Recurrencefield Field ; Goto label_0023; Label_001b : Field. deleteexceptionitem (); return; Label_0023 : If (enumerator. movenext () {goto label_0036;} return; Label_002e : Field. deleteinstanceitem (); return; Label_0036 : Control = (Control) enumerator. Current; If (control is recurrencefield) {goto label_005c;} goto label_0023; Label_004d : If (! Base. listitem. isexceptionid) {return;} goto label_001b; Label_005c : Field = (recurrencefield) control; If (! Base. listitem. isinstanceid) {goto label_004d;} goto label_002e ;}}}}