StringBuilder Class is absent in the Spire.Presentation v2.2

[simplyshadaabkhan@gmail.com]

I am new into this Spire Presentation. I was trying to extract text from presentation by using StringBuilder class but while using that class (StringBuilder) it is saying "StringBuilder could be found". I am using Spire.Presentation Pack Version:2.2.22. Please help me out

[Betsy]

Hello,

Thanks for your inquiry.
The class(StringBuilder) is in System.Text namespace, please check if you use System.Text.

Sincerely,
Betsy
E-iceblue support team

[Betsy]

Hello,

Has your issue been resolved?
Thanks for your response.

Sincerely,
Betsy
E-iceblue support team