Tagging word document

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C#

MS-Word

I need to tag string in bold, Underlined, Italics.
Example :
Input : This strings are not in bold but this string are in bold.This is italics.


Ouput:

Quote:

This strings are [u]not in bold[/u] but [b]this string are in bold[/b].[i]This is italics[/i]

individual words are getting tagged instead of sentence like this [b] Home [/b] [b] Page [/b]/[b] Dashboard [/b] but expected is like [b] Home Page /Dashboard [/b]

What I have tried:

Microsoft.Office.Interop.Word.Range rngFindBold = doc.Content;
           rngFindBold.Find.Font.Bold = -1; //true

rngFindBold.Find.Execute(FindText: "(<*>)", Format: true, ReplaceWith: " ^& ",Wrap:Microsoft.Office.Interop.Word.WdFindWrap.wdFindContinue, MatchWildcards: true, Replace: Microsoft.Office.Interop.Word.WdReplace.wdReplaceAll);