Change TargetFrameworkVersion to 4.0 to run tests in VS2010
Fix Null Exception in CreateAttachment, Check name parameter exists before use. (And Test for MessageWithAttachmentToMIME822)
Update From Header in Test to contain ","
Seen this in real messages and that results in incorrect From DisplayName in current implementation.
Merge pull request #38 from ASoft-se/VS2010_Tests

Change TargetFrameworkVersion from 4.5 to 4.0