[Thermal Desktop] [OpenTD] Connecting to Thermal Desktop within C# Methods

[mhaas]

Hi,
I am writing an OpenTD script in C# that I organize into methods. I want to be able to create an instance of Thermal Desktop only once for the whole namespace. Currently, in each method I have the following lines of code.

var td = new ThermalDesktop();
td.ConnectConfig.DwgPathname = dwgFilePath;
td.Connect();

where dwgFilePath is a string I input into each method. This method works, but takes a long time to connect to Thermal Desktop, and I call methods with this header hundreds of times in my scripts.

I am looking for a way to not have to redefine (and hopefully reconnect to) Thermal Desktop within each method, while still being able to use the td alias within the method. Is there a way to declare these three lines globally? When I try to declare it at the class level, I am unable to use the type var.

Thank you!