Find Install directory and working directory of VSTO Outlook Addin; or any Office Addin

Question

I created a VSTO Outlook Addin that uses a library Html2Xhtml.dll (.NET) which calls another Html2xhtml.exe by executing System.Diagnostic.Process.Start().

However,

Answer 1

I found the answer here, full credits to robindotnet.wordpress.com.

//Get the assembly information
System.Reflection.Assembly assemblyInfo = System.Reflection.Assembly.GetExecutingAssembly();

//Location is where the assembly is run from 
string assemblyLocation = assemblyInfo.Location;

//CodeBase is the location of the ClickOnce deployment files
Uri uriCodeBase = new Uri(assemblyInfo.CodeBase);
string ClickOnceLocation = Path.GetDirectoryName(uriCodeBase.LocalPath.ToString());