Both are entirely differ from each other. .NET was a new technology developed from the ground up by MS. Only the syntax of VB is used in vb .net and Java in C# .NET.
Try to learn this from the base (Especially the Framework, Library, Runtime etc) and then move on to mock codings. Else it will be difficult.
:)
plz people help me as in am a begineer in .net so an an body explain the basic dif between vb an vb.net an asp an asp.net