.NET Framework 1.1

C# v1.0 - Visual Studio 2003
1.1.4322.573 - Original
The .NET Framework version 1.1 provides improved scalability and performance, support for mobile device development with ASP.NET mobile controls (formerly the Microsoft Mobile Internet Toolkit), support for Internet Protocol version 6, and ADO.NET classes for native communication with Open Database Connectivity (ODBC) and Oracle databases.

Service Pack 1

1.1.4322.2032 - SP1
Service Pack 1 includes roll-ups of all reported customer issues found after the release of the Microsoft .NET Framework 1.1. Of particular note, SP1 provides better support for consuming WSDL documents, Data Execution prevention and protection from security issues such as buffer overruns.