2 important Service Packs for .NET Framework 1.1 and 1.0 are released: .NET Framework 1.1 Service Pack 1 and .NET Framework 1.0 Service Pack 3.
Focused on improve the security, they include roll-ups of all reported customer issues found after the release of the relative Microsoft .NET Framework, provide better support for consuming WSDL documents, Data Execution prevention and protection from security issues such as buffer overruns, provide support for Windows XP Service Pack 2 to provide a safer, more reliable experience for customers using Windows XP.