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Sign DOC File with Digital Signatures in .NET

Digitally sign and verify signatures in a DOC file and various other document formats within C#, ASP.NET, VB.NET & Xamarin applications. Implement Barcode, Text, Image, Metadata, QR Code, Form Field and stamp signatures in multiple forms by setting up customized text, font style, colors and adjusting advanced e-signatures properties in the document.

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How to Digitally Sign DOC Files in C#

Conholdate.Total for .NET supports signing DOC documents with digital signatures using a few lines of C# .NET code.

  • Instantiate Signature with input document
  • Instantiate DigitalSignOptions object with certificate details
  • Call Sign method of Signature class and pass DigitalSignOptions to it
  • Set options to view signed document as HTML

APIs Download & Installation Instructions

The following piece of code requires GroupDocs.Signature & GroupDocs.Viewer namespaces. You can get the respective files from the downloads or fetch the whole package from NuGet.

Sign your digtial documents with Barcode, Text, Image, Metadata, QR Code, Form Field and stamp signatures on operating systems such as Windows, Linux or macOS while using platforms such as Windows Azure, Mono and Xamarin.


Search Barcode Signatures in PDF File in C#

Search a wide variety of e-signature types from a digitally signed PDF document by setting up advanced signatures manipulation options and search filters to get a list of electronic signatures that match with the search criterion.

  • Instantiate Signature with input document
  • Instantiate DigitalSearchOptions object as per requirements and specified search options
  • Call Search method of Signature class instance and pass DigitalSearchOptions to it

Sign, Verify, Update & Delete Signatures

Using Conholdate.com APIs – developers can implement different signatures customization options to add and view e-signatures from a wide range of popular document file formats.

Users can also search and verify some specific signatures from an already signed digital document; manipulate signatures based on size or textual content and delete any signatures from the same document.


What is DOC file format?

The DOC file format, initially developed by Microsoft in the early 1990s for their renowned word processing software, Microsoft Word, continues to be widely utilized today and remains closely associated with the Microsoft Office suite. DOC files store documents in ASCII text format, preserving special formatting such as bold, italics, and underlined text. Moreover, they retain essential elements like images, diagrams, charts, tables, and other formatting elements used within the document.

A prominent advantage of the DOC format lies in its compatibility with a diverse range of software applications, including WordPerfect, OpenOffice, and various office suites. This compatibility facilitates seamless sharing and collaboration on documents across different platforms. Additionally, DOC files can be effortlessly accessed and opened using most web browsers, enabling convenient online document viewing and sharing.

The simplicity and user-friendliness of the DOC format contribute significantly to its widespread popularity. Microsoft Word offers an intuitive environment for creating, editing, and formatting documents, making it an accessible choice for users. The format’s extensive adoption and support further ensure that DOC files can be accessed and opened by a vast majority of users, fostering effective collaboration and communication.

Furthermore, the DOC format boasts reliability and security features. DOC files are designed to be resistant to data corruption, preserving the integrity of documents over time. This reliability ensures that crucial information remains intact and accessible. Additionally, the format supports various encryption options, empowering users to safeguard sensitive information within their documents, enhancing privacy and data security.

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Popular Document Signature Options with .NET

Sign PDF Files

(Portable Document Format)

Sign WORD Files

(Word Processing Files)

Sign EXCEL Files

(Spreadsheet Files)

Sign DOC Files

(Microsoft Word Binary Format)

Sign DOCX Files

(Office 2007+ Word Document)

Sign DOCM Files

(Microsoft Word 2007 Marco File)

Sign DOT Files

(Microsoft Word Template Files)

Sign DOTM Files

(Microsoft Word 2007+ Template File)

Sign DOTX Files

(Microsoft Word Template File )

Sign XLS Files

(Microsoft Excel Spreadsheet (Legacy))

Sign XLSB Files

(Excel Binary Workbook)

Sign XLSM Files

(Macro-enabled Spreadsheet)

Sign XLSX Files

(Open XML Workbook)

Sign XLTM Files

(Excel Macro-Enabled Template)

Sign XLTX Files

(Excel Template)

Sign PPT Files

(Microsoft PowerPoint 97-2003)

Sign PPTX Files

(Open XML presentation Format)

Sign PPS Files

(PowerPoint Slide Show)

Sign PPSX Files

(PowerPoint Slide Show)

Sign POTX Files

(Microsoft PowerPoint Template Presentation)

Sign POTM Files

(Microsoft PowerPoint Template File)

Sign CMX Files

(Corel Metafile Exchange Image)

Sign BMP Files

(Bitmap Image File)

Sign JPEG Files

(Joint Photographic Expert Group Image)

Sign GIF Files

(Graphical Interchange Format)

Sign PNG Files

(Portable Network Graphic)

Sign WEBP Files

(Raster Web Image Format)

Sign TIFF Files

(Tagged Image File Format)

Sign WMF Files

(Windows Metafile)

Sign PSD Files

(Photoshop Document)

Sign SVG Files

(Scalar Vector Graphics)

Sign ODP Files

(OpenDocument Presentation Format)

Sign OTP Files

(OpenDocument Standard Format)

Sign ODS Files

(OpenDocument Spreadsheet)

Sign OTS Files

(OpenDocument Spreadsheet Template)

Sign ODT Files

(OpenDocument Text File Format)

Sign OTT Files

(OpenDocument Standard Format)

Sign IMAGE Files

(Digital Image Files)

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