public IReadOnlyList<Domain> GetDomains()

await QueuedTask.Run(() =>
{
  using (var kg = GetKnowledgeGraph())
  {
    if (kg == null)
      return;

    //Get all the domains in the KG
    var domains = kg.GetDomains();
    var sb = new SchemaBuilder(kg);

    foreach (var domain in domains)
    {
      //skip the special provenance domain
      var name = domain.GetName();
      if (string.Compare(name, "esri__provenanceSourceType", true) == 0)
        continue;//skip this one

      //Delete all other domains
      if (domain is RangeDomain rd)
        sb.Delete(new RangeDomainDescription(rd));
      else if (domain is CodedValueDomain cvd)
        sb.Delete(new CodedValueDomainDescription(cvd));
    }

    try
    {
      //note: will throw an InvalidOperationException if there are no operations
      //to run. Will also delete associated fields dependent on deleted domain(s)
      if (!kg.ApplySchemaEdits(sb))
      {
        var err_msg = string.Join(",", sb.ErrorMessages.ToArray());
        System.Diagnostics.Debug.WriteLine($"Delete domains error: {err_msg}");
      }
    }
    catch (Exception ex)
    {
      System.Diagnostics.Debug.WriteLine(ex.ToString());
    }
  }
});