查询Entity Framework 4.0的生命周期关键日期（EOL、支持结束等）

Hey there! Let me break down the lifecycle dates you're after for Entity Framework 4.0. Since EF 4.0 is tightly integrated as a component of .NET Framework 4.0, its support timeline directly aligns with that framework—which explains why you won't find a standalone entry for it on Microsoft's product lifecycle page.

Here are the key dates you need:

• 终止日期（End of Life Date）: January 14, 2020
• 支持结束日期（End of Support Date）: January 13, 2015 (this marks the end of mainstream support)
• 扩展支持结束日期（End of Extended Support Date）: January 14, 2020

A quick note: After these dates, Microsoft stopped providing security patches, bug fixes, and official technical support for both EF 4.0 and the underlying .NET Framework 4.0.

内容的提问来源于stack exchange，提问作者Jwalant Natvarlal Soneji