Validate method
Implementation
@override
void Validate() {
super.Validate();
EwsUtilities.ValidateParamCollection(this.Folders, "Folders");
for (int i = 0; i < this.Folders.length; i++) {
Folder folder = this.Folders[i];
if ((folder == null) || folder.IsNew) {
throw new ArgumentException("FolderToUpdateCannotBeNullOrNew($i)");
}
folder.Validate();
}
}