When using C# snippets, you have access to all the features of the C# language. It includes an extensive library of classes and methods that covers most of the tasks you might have. You can find a description and capabilities of the library classes on the page .NET Framework Class Library
If you haven't found a class that solves your problem, you can connect a third-party class library. To do this, you need to add the Links from the GAC element to the panel in which to connect your library.
How to use?
If, when using C# snippets, you did not find a class that solves your problem, you can connect a third-party class library. To do this, add the GAC Link element to the static blocks panel.
New element will be added on the static blocks panel:
When you open this element a window will appear in which the currently connected libraries are listed.
Using the “Add” button, you need to add your library by selecting from the list or loading from a file.
You can also set a filter to find the data you want.
When using the .NET Framework Standard Class Library or a third-party library, you should use using directives and shared code to access classes bypassing the namespace and aesthetically pleasing your code.