C-sharp, C♯, or C# may refer to:
*
C♯ (musical note)
**
C-sharp major
C-sharp major (or the key of C-sharp) is a major scale based on C, consisting of the pitches C, D, E, F, G, A, and B. It is enharmonically equivalent to D-flat major. Its key signature has seven sharps.
The C-sharp major scale is:
:
I ...
, a musical scale
**
C-sharp minor
C-sharp minor is a minor scale based on C, with the pitches C, D, E, F, G, A, and B. Its key signature consists of four sharps.
The C-sharp natural minor scale is:
:
Changes needed for the melodic and harmonic versions of the scale ar ...
, a musical scale
*
C# (programming language), a programming language pronounced as "C-sharp"
{{disambiguation