Add "system text" programmatically

Questions
1

How to add programmatically “system text”? In Litium back-office, it can be done from:

Settings>>System settings>> System texts

I want to use this text for the name of a custom panel that I added to a project.

systemtext1
systemtext1720×551 17.3 KB

Litium version: [5.6.10]

2

Litium.Foundation.Solution.Instance.SystemStrings.SetString(…)

3

Thanks, also, is there any class to add these strings as properties as we have for example in WebsiteStrings?

4

There is no class for that like WebsiteStrings.

5

Ok, thanks for your help.