Spire.PDF 3.6 supports to verify if the PDF document is modified after sign

We are pleased to announce a new release version-Spire.PDF 3.6 today. With the effort of our develop team, we add new feature to the PDF digital signature and we are also focus on improving the performance of PDF. Viewing the following full description of its enhanced functions:
New Features:
Add the VerifyDocModified method to verify if the document is modified after sign.
bool modified = signatureOne.VerifyDocModified();
Add new type for ConfiguerGraphicType to set the picture is on the left of the signature.
signature.ConfigGraphicType = ConfiguerGraphicType.SignInformationPicture;
Bug solutions:
- Fixes the issue that caused the grey line in the background when print.
- Fixes the issue where some pdf documents can't be converted to pdf.
- Optimizes the performance to convert XPS to DPF.
- Resolves the issue that caused the exception when load a pdf document.
- Fixes the issue that caused the exception that value cannot be null when set Conformance property.
- Fixes the issue that caused the exception when use the insertPageRange method.
- Fixes the issue that caused the exception when convert PDF to image.
- Resolves the issue that caused the border lost when convert PDF to image.
- Resolves the issue that caused content incorrect when convert pdf to image.
- Fixes the issues where the blank page can't be deleted when call Remove or RemoveAt method.
- Fixes the issue that caused an ArgumentOutOfRange Exception when call the FindText method.
- Add the PngDirectToJpeg property to avoid the outofmemory when call DrawImage method.
- Fixes the issue where the filled filed text did not print.
Free Trial to evaluate Spire.PDF 3.6 here:
http://www.e-iceblue.com/Download/download-pdf-for-net-now.html