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Home/ Questions/Q 8005877
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Editorial Team
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Editorial Team
Asked: June 4, 20262026-06-04T17:20:09+00:00 2026-06-04T17:20:09+00:00

My EntityFramework reference has a yellow triangle warning left of it, and my project

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My EntityFramework reference has a yellow triangle warning left of it, and my project says it’s missing.

Could not resolve this reference. Could not locate the assembly
“EntityFramework, Version=4.1.0.0, Culture=neutral,
PublicKeyToken=b77a5c561934e089, processorArchitecture=MSIL”. Check to
make sure the assembly exists on disk. If this reference is required
by your code, you may get compilation errors.

How do I resolve this problem?

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  1. Editorial Team
    Editorial Team
    2026-06-04T17:20:11+00:00Added an answer on June 4, 2026 at 5:20 pm

    The GAC path is C:\Windows\assembly.

    However, you resolve your error, you must use NuGet to install the EntityFramework package (or do it manually but that’s harder and doesn’t allow you to upgrade).

    1. Install NuGet if you haven’t already
    2. Right click on your project and “Manage NuGet packages”
    3. Search for EntityFramework
    4. Install

    Later, you can use the same dialog under “Updates” to install updated versions of the EntityFramework.

    In the case that you need to install 4.1.0.0 in particular because a third-party lib is using it and won’t work with anything higher, install the appropriate package version from here.

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