The ShortCut enum values were already carefully chosen to be an exact match with the Keys enumeration for the short-cut. For example, ShortCut.CtrlShiftF1 is 0x30070 which matches (Keys.Control | Keys.Shift | Keys.F1): 0x20000 | 0x10000 | 0x00070 = 0x30070. This was not an accident.
Converting the ShortCut to a string is already provided, a menu item in MenuStrip can automatically display the string of the MenuItem.Shortcut if you set its ShowShortcut property to True. You can use the same technique in your own code, use the KeysConverter class:
var sc = Shortcut.CtrlShiftF1;
var txt = new KeysConverter().ConvertToString((Keys)sc);
Console.WriteLine(txt);
Output:
Ctrl+Shift+F1
.
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