Recommendations on parsing .eml files in C#

Question

I have a directory of .eml files that contain email conversations. Is there a recommended approach in C# of parsing files of this type?

Answer 1

Follow this link for a good solution:

The summary of the article is 4 steps(The second step below is missing in the article but needed):

1. Add a reference to "Microsoft CDO for Windows 2000 Library", which can be found on the ‘COM’ tab in the Visual Studio ‘Add reference’ dialog. This will add 2 references to "ADODB" and "CDO" in your project.

2. Disable embedding of Interop types for the 2 reference "ADODB" and "CDO". (References -> ADODB -> Properties -> Set 'Embed Interop Types' to False and repeat the same for CDO)

3. Add the following method in your code:

   protected CDO.Message ReadMessage(String emlFileName)
   {
       CDO.Message msg = new CDO.MessageClass();
       ADODB.Stream stream = new ADODB.StreamClass();
       stream.Open(Type.Missing, 
                      ADODB.ConnectModeEnum.adModeUnknown, 
                      ADODB.StreamOpenOptionsEnum.adOpenStreamUnspecified,                                                                         
                      String.Empty, 
                      String.Empty);
       stream.LoadFromFile(emlFileName);
       stream.Flush();
       msg.DataSource.OpenObject(stream, "_Stream");
       msg.DataSource.Save();
       return msg;
   }
   

4. Call this method by passing the full path of your eml file and the CDO.Message object it returns will have all the parsed info you need including To,From, Subject, Body.