Squashed 'src/C#/libs/solar/' content from commit 3456338

git-subtree-dir: src/C#/libs/solar
git-subtree-split: 34563380fff2d6e124cdb673a43b2155811a1544
Merge commit '4057ed17e7718b7a347b52ec9ecd36881feca629' as 'src/C#/libs/solar'