What is the difference between c# and visual c#? [duplicate]

Visual C# is an implementation of the C# language by Microsoft.

Visual C# is just C#. You can build any kind of .NET application using C# and Visual Studio makes it easier test and debug your application.
for example using Visual Studio brings you lots of capabilities :

1. Code Editor

2. Debugger

3. Designer

4. Windows Forms Designer

5. WPF Designer

   ,…

for more information about Visual Studio read this page:
http://en.wikipedia.org/wiki/Microsoft_Visual_Studio

Update: Visual C# is the marketing name that Microsoft uses for C#, So nobody calls it Visual C#.