v1.11.1

Performance improvements for number write (pull request #59).

v1.11.0

Leading or trailing whitespace in string cells is now preserved (fixes #58)
Validation and optional skipping of invalid XML characters, inspired by pull request #56 by @mike101200

v1.10.0

Ability to hide worksheets, thanks to Micha Voße (solves #45)

v1.9.2

Fixed #50 (only produce when formatted columns are present)
Micro-optimization to reduce pressure on the garbage collector, inspired from PR #46 by @AntonyCorbett
Upgraded SharpCompress.

v1.9.1

Fix wrongly increased column number when a column span greater than two is used (issue #40).

v1.9.0

Optionally force writing cell references for compatibility with some readers, thanks to Mikk182; header and footer functionality thanks to soend

v1.8.0

Ability to hide grid lines and row and column headers from worksheets, thanks to Rajeev Datta

v1.7.4

Fix culture problem in stylesheet (pull request #28)

v1.7.3

Fixed ContentType for PowerBI compatibility (pull request #23).

v1.7.2

Add app.xml metadata to identify file producer.