How to Implement the below function points?

[memoryfraction]

How to implement the below function points?
1 List GetOpeningOrders(string symbol, startDt, endDt = DateTime.Now)
2 Order CancelOrder(int orderId), GetCanceledOrders()
3 List GetCompletedOrders(startDt, endDt = DateTime.Now)
4 List GetSymbols(int number = 500) // get all the valid symbols, e.g. ranking by market cap

thinking, if I can have a sample code, I can implement the rest of the order function , and Pull Request

Thanks

[memoryfraction]

For example, I tested using a paper account. found that

Contract contract = new()
{
    SecurityType = ContractSecurityType.Stock,
    Symbol = "AMZN",
    Currency = "USD",
    Exchange = "SMART"
};

int orderId = Client.Request.GetNextId();

Order order = new()
{
    Action = OrderAction.Buy,
    TotalQuantity = 1,
    OrderType = OrderTypes.Limit,
    LimitPrice = 1,
    TimeInForce = OrderTimeInForce.GoodUntilCancelled
};

Task<Execution?> task1 = Client
.Response
.OfType<Execution>()
.Take(TimeSpan.FromSeconds(5))
.FirstOrDefaultAsync()
.ToTask();

Client.Request.PlaceOrder(orderId, order, contract);
Execution? execution1 = await task1;

The below code is able to create the order, but how to get the response? e.g. created orderId? order creation result? failed or succeed? since the execution1 is null

Client.Request.PlaceOrder(orderId, order, contract);

[memoryfraction]

Added a Pull Request: #21
Needs review and some input