本文详细讲解在Windows 11 25H2系统下离线安装.NET Framework 3.5的完整方案，涵盖官方离线源（sources\sxs）获取、DISM命令行安装、PowerShell封装调用、常见错误代码（如0x800F081F、0x800F0954）排查及版本 ...
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