C# SDK Get issue based on custom field Labels

Jira Development Jira Server
1

Hi,
I am trying to get issues based on a custom label field but with no luck.
Here are some examples of what I am trying to do.
My field is Called “Customers” and is of the type “Labels”

For example

    var Issues = (from i in jiraService.Issues.Queryable
                  where i.CustomFields["Customers"].Values.Contains(Customer)
                  select i).ToList();


    var Issues = (from i in jiraService.Issues.Queryable
                  where i["Customers"] == Customer 
                  select i).ToList();

Any one have an Idea how I can get the issues that have the Label I am searching for ?

Best Regards,
Valdi Hafdal