There is nothing called M# C is one of the notes in the chromatic scales. Others are: A A# B C C# D D# E F F# G G# Now for each of these notes one can build a chord. In fact one can build various chord flavors for the same note. Some flavors are: Major Minor Augmented Diminshed 7th etc. So a C is a C Major chord. Cm is a C minor chord. Samajh gaya? If not, read some articles on chords.
Get some basic lessons in music theory. There are 7 musical notes namely A B C D E F G. # means Sharp A# means A sharp.
