GetWebRoleByName

/// <summary>
/// Retrieves a web role entity by its name from the adx_webrole entity.
/// </summary>
public Entity GetWebRoleByName(IOrganizationService service, string webRoleName)
{
    QueryExpression webRoleQuery = new QueryExpression("adx_webrole")
    {
        ColumnSet = new ColumnSet("adx_name"),
        Criteria = new FilterExpression
        {
            Conditions = { new ConditionExpression("adx_name", ConditionOperator.Equal, webRoleName) }
        }
    };

    EntityCollection results = service.RetrieveMultiple(webRoleQuery);
    return results.Entities.FirstOrDefault(); // Return the first match or null
}