Lambda expression in IF condition

I have following classes:

public class GetAdditionalProductCatalogResponse
{
    public List<AdditionalProductDetail> AdditionalProductDetail { get; set; }
}

public class AdditionalProductDetail
{
    public string Type { get; set; }
    public string ServiceType { get; set; }
    public List<AdditionalProduct> AdditionalProduct { get; set; }
}

I have an want GetAdditionalProductCatalogResponse object and I want to check in an if condition whether an AdditionalProductDetail exists whose ServiceType = "Phone". Is it possible?

//if(getAdditionalProductCatalogResponse.AdditionalProductDetail.Where)

Is it possible?