C# create bar

[hvdsidf]

Hi,

I'm new in C#. 

When I create a bar with the below code, it show a error.

I can create a bar with this code: Str.Bars.Create(bNumber,nS_number, nE_number)

And then assigne : IRobotBar b = (IRobotBar)Str.Bars.Get(bNumber);

But I dont' like this way.

Please help, thanks.