grazie
funziona perfettamente ..
Protected Sub LinkButton5_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles LinkButton5.Click
Dim portal As CuteChat.ChatPortal = CuteChat.ChatSystem.Instance.GetCurrentPortal()
SyncLock portal
Dim identity As CuteChat.ChatIdentity = CuteChat.ChatWebUtility.GetLogonIdentity()
portal.DataManager.AddContact(identity, "User:" & "bobby")
form ignore 1° add user 2° ignore
portal.DataManager.AddIgnore(identity, "User:" & "bobby")
End SyncLock
End Sub