Instead of overriding the dashboard-items list, add new items to it.
@@ -992,9 +992,7 @@
:after
projectile
:config
(setq dashboard-items '((recents . 5)
(bookmarks . 5)
(projects . 5)))
(add-to-list 'dashboard-items '(projects . 5) t)
(dashboard-setup-startup-hook))
(use-package csharp-mode
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