Special character issue textframe

We are using the below code snippet to display the content.The content is coming from database . If the actual content have special characters like bullet point or double quotes , those special characters are not rendering properly in Aspose .Please suggest how to do this?

IAutoShape primObj = (IAutoShape) sld.findShapeByAltText(“primaryObj”);
String primObjTxt = primObj.getTextFrame().getText().replace(“primaryObj”,“Actual Content”);
primObj.addTextFrame(primObjTxt);

@BNYMellonITAMSoftwareOperations,

I have observed your requirements and request you to please try using Aspose.Slides for .NET 18.10 on your end first. If there is still an issue then please provide the source presentation, input character string and working sample project reproducing the issue. We will be able to investigate the issue further on our end on provision of requested information.