Verify that a Dynamics 365 record exists

DoesRecordExist.cs

private static bool DoesRecordExist(IOrganizationService crmService, string entityName, Guid id)
{
    try
    {
        crmService.Retrieve(entityName, id, new ColumnSet());
    }
    catch (Exception ex)
    {
        if (ex is FaultException<OrganizationServiceFault> orgException)
        {
            // https://learn.microsoft.com/en-us/power-apps/developer/data-platform/reference/web-service-error-codes
            if (orgException.Detail.ErrorCode == -2147220969)
            {
                return false;  //Record does not exist
            }

            throw;
        }
    }

    return true;   //Record exists
}