Which is better Abap or Netweaver

Hello friends

I am dotnet developer with 2+ yrs experiance ,i developed web and windows applications using c# ,

now i want to move towards SAP ,as a developer i have to choose technical module

but my dout is in that technical which is best as per my experiance in C#

either ABAP or NetWeaver which is most related to a developer point of view

can any one give the pre requsites for learning ABAP or NetWeaver

Thanks