The "The server committed a protocol violation" error in C# OData typically occurs when there is a mismatch between the protocol version used by the client and the server. Here are a few possible solutions to resolve this issue:

  1. Update the client library: Make sure you are using the latest version of the OData client library in your C# application. Upgrading to the latest version can resolve compatibility issues and ensure that the client and server are using compatible protocol versions.

  2. Check the OData protocol version: Verify the OData protocol version supported by the server you are connecting to. The protocol version can vary depending on the server implementation. Ensure that your client library is configured to use the correct protocol version when communicating with the server.

  3. Verify compatibility between client and server: Confirm that the client library and the server are compatible with each other in terms of the OData protocol version. If the server is using an older or different version of the protocol, you may need to adjust the client library or consider updating the server to a compatible version.

  4. Check server configuration: Review the server configuration to ensure that it is correctly handling requests and responses according to the OData protocol. There might be misconfigurations or issues with the server setup that are causing the protocol violation.

  5. Debug the request and response: Capture the network traffic between the client and the server using a tool like Fiddler or Wireshark. Analyze the request and response headers to identify any inconsistencies or protocol violations. This can help pinpoint the exact issue and guide you in finding a resolution.

It's worth noting that the specific steps to resolve this error may vary depending on the OData client library and the server implementation you are using. Review the documentation and resources specific to your client library and server to find the appropriate solutions for your scenario.

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