Assembly 'Microsoft.Crm.Sdk.Proxy' with identity 'Microsoft.Crm.Sdk.Proxy, Version=9.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35' uses 'Microsoft.Xrm.Sdk, Version=9.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35' which has a higher version than referenced assembly 'Microsoft.Xrm.Sdk' with identity 'Microsoft.Xrm.Sdk, Version=8.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35'

 Please refer here for more details, usually when there is a mismatch for DLLs version this error occured.

https://vjcity.blogspot.com/2021/07/could-not-load-file-or-assembly.html

Remove the wrong version of the DLL’s and add the correct version of the DLL’s

Here are some other links for Troubleshooting and learning:

·       Plugin in Dynamic 365 CRM

·       Connect to Dynamic 365 CRM from Console App using Azure Authentication

·       Could not load file or assembly 'System.Net.Http, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a' or one of its dependencies

·       Unable to Login to Dynamics CRMOrganizationWebProxyClient is null

·       Assembly 'Microsoft.Crm.Sdk.Proxy' with identity 'Microsoft.Crm.Sdk.Proxy, Version=9.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35' uses 'Microsoft.Xrm.Sdk, Version=9.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35' which has a higher version than referenced assembly 'Microsoft.Xrm.Sdk' with identity 'Microsoft.Xrm.Sdk, Version=8.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35'

·       Could not load file or assembly 'Microsoft.Xrm.Sdk, Version=9.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35' or one of its dependencies. The located assembly's manifest definition does not match the assembly reference.

·       Could not load file or assembly 'Microsoft.Xrm.Sdk, Version=6.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35' or one of its dependencies