Overview Notes

Issues Motivating Creation of .Net

• Unify Programming Models
  Before .Net: VB6, Visual C++ with MFC and ATL, VBA, J++ and JScript.

• Language Interoperability
  Ships with .Net: C#, Visual Basic, Managed C++

  Available from third parties: Ada, APL, Cobol, Eiffel, Forth, Fortran, Haskell, IS/MSIL, J++, Java, JavaScript, Lisp, Logo, Modula-2, Oberon, Pascal, PHP, Prolog, Python, Ruby, RPG, Scala, Scheme, Smalltalk, SML, Spry, Tck/Tk

• Improve Old Technologies: COM, DCOM, COM+, ASP, ADO

• COM was difficult to use

• DLL Hell

• Registry is Cumbersome

• Respond to trends in enterprise software development: Distributed Computing, Java RMI, CORBA, XML, SOAP, WSDL

  Example SOAP Request and Response

• Enterprise services: Support for transactions, security, object pooling

• Influence of Java and J2EE: Virtual Machine Environment