Why Am I Getting a MetadataException: Unable to Load Metadata Resource?

Resolving MetadataException: Unable to load metadata resource

You encountered a MetadataException when instantiating the generated ObjectContext class. Even though you have verified the connection string in App.Config and regenerated the EDMX file, the problem persists.

Possible reasons for this exception:

• MetadataArtifactProcessing Property: This exception may be caused if you set the model's MetadataArtifactProcessing property to "Copy to Output Directory".
• Connection string error: Even if you think the connection string is correct, recent changes to other parameters (such as the assembly name) may have inadvertently affected it.
• Embedding EDMX using a post-compile task: Embedding EDMX into an assembly using a post-compile task may stop working for unforeseen reasons.

Solution suggestion:

Due to the limited details in your question, it is difficult to provide a clear solution. However, please consider the following steps:

• Check the MetadataArtifactProcessing property and make sure it is set to "Embedded in assembly".
• Check the connection string carefully to ensure its accuracy, especially if any changes have been made recently.
• Check the post-compilation task embedded in EDMX to verify that it is functioning properly.

If the problem persists, please see the provided blog post for additional troubleshooting steps: [Blog Post Link]

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