Update Excel.cs

[denizmaral]

Please Note:

1. Before submitting the PR, please review How to Contribute to Dynamo
2. Dynamo Team will meet 1x a month to review PRs found on Github (Issues will be handled separately)
3. PRs will be reviewed from oldest to newest
4. If a reviewed PR requires changes by the owner, the owner of the PR has 30 days to respond. If the PR has seen no activity by the next session, it will be either closed by the team or depending on its utility will be taken over by someone on the team
5. PRs should use either Dynamo's default PR template or one of these other template options in order to be considered for review.
6. PRs that do not have one of the Dynamo PR templates completely filled out with all declarations satisfied will not be reviewed by the Dynamo team.
7. PRs made to the DynamoRevit repo will need to be cherry-picked into all the DynamoRevit Release branches that Dynamo supports. Contributors will be responsible for cherry-picking their reviewed commits to the other branches after a LGTM label is added to the PR.

Purpose

Related to DynamoDS/DynamoWishlist#200

Declarations

Check these if you believe they are true

• The codebase is in a better state after this PR
• Is documented according to the standards
• The level of testing this PR includes is appropriate
• User facing strings, if any, are extracted into *.resx files
• All tests pass using the self-service CI.
• Snapshot of UI changes, if any.
• Changes to the API follow Semantic Versioning and are documented in the API Changes document.
• This PR modifies some build requirements and the readme is updated
• This PR contains no files larger than 50 MB

Release Notes

(FILL ME IN) Brief description of the fix / enhancement. Mandatory section

Reviewers

(FILL ME IN) Reviewer 1 (If possible, assign the Reviewer for the PR)

(FILL ME IN, optional) Any additional notes to reviewers or testers.

FYIs

(FILL ME IN, Optional) Names of anyone else you wish to be notified of

[pinzart90]

Changed to draft PR temporarily while we look into some CICD issues.

[aparajit-pratap]

@denizmaral this is an opensource project. For the benefit of everyone it would be extremely useful if you write a description and purpose for this PR if nothing else.

[denizmaral]

Please see the Feature request DynamoDS/DynamoWishlist#200

[QilongTang]

hi @aparajit-pratap Do you know the latest state on this PR? Is this something we could ship now?

[pinzart90]

I think the changes in this PR need to be moved from DSOffice/Excel.cs to DSOfficeUtilities/Excel.cs
We moved all Excel types/dependencies into DSOfficeUtilities because of issues with embedded types and the Dynamo engine
FYI @aparajit-pratap @QilongTang @denizmaral