C sharp - Name Reason !

The name "C sharp" was inspired by musical notation where a sharp indicates that the written note should be made a half-step higher in pitch. This is similar to the language name of C++, where "++" indicates that a variable should be incremented by 1. Anders Hejlsberg,leading developer of the language has a passion with music wich results in the name's success

By coincidence, the sharp symbol resembles four conjoined plus signs. This reiterates Rick Mascitti's tongue-in-cheek use of '++' when naming 'C++': where C was enhanced to create C++, C++ was enhanced to create C++++ (that is, C#).

Due to technical limitations of display (standard fonts, browsers, etc.) and the fact that the sharp symbol (?, U+266F, MUSIC SHARP SIGN) is not present on the standard keyboard, the number sign (#, U+0023, NUMBER SIGN) was chosen to represent the sharp symbol in the written name of the programming language.Microsoft uses the intended musical symbol.

The "sharp" suffix has been used by a number of other .NET languages that are variants of existing languages, including J# (a .NET language also designed by Microsoft which is derived from Java 1.1), A# (from Ada), and the functional F#. The original implementation of Eiffel for .NET was called Eiffel#, a name since retired since the full Eiffel language is now supported. The suffix has also been used for libraries, such as Gtk# (a .NET wrapper for GTK+ and other GNOME libraries), Cocoa# (a wrapper for Cocoa) and Qt# (a .NET language binding for the Qt toolkit).