public static void Run()
{
// ExStart:DeleteTaskOnExchange
// Create instance of ExchangeClient class by giving credentials
IEWSClient client = EWSClient.GetEWSClient("https://outlook.office365.com/ews/exchange.asmx", "testUser", "pwd", "domain");
// Get all tasks info collection from exchange
ExchangeMessageInfoCollection tasks = client.ListMessages(client.MailboxInfo.TasksUri);
// Parse all the tasks info in the list
foreach (ExchangeMessageInfo info in tasks)
{
// Fetch task from exchange using current task info
ExchangeTask task = client.FetchTask(info.UniqueUri);
// Check if the current task fulfills the search criteria
if (task.Subject.Equals("test"))
{
//Delete task from exchange
client.DeleteTask(task.UniqueUri, DeleteTaskOptions.DeletePermanently);
}
}
// ExEnd:DeleteTaskOnExchange
}