public void SetGetReleases()
{
  /*
    Set target releases for requirement
    To set Target Cycles to Requirement, use requirement field RQ_TARGET_RCYC.
   */
  ReqFactory rFactory;
  Req requirement;
  List outlistOfReleases, listOfReleases;
  long requirementId;
  StringBuilder strReleasesNames = new StringBuilder();

  //listOfReleases can be a list of release IDs or a list of Release objects.

  listOfReleases = new List();
  listOfReleases.Add(2);
  listOfReleases.Add(3);
  listOfReleases.Add(4);
  //For Example: You can attach the release like this.
  /*
  ReleaseFactory relF = (ReleaseFactory) tdConnection.ReleaseFactory;
  listOfReleases = relF.NewList("");
  */

  requirementId = 9;
  rFactory = (ReqFactory)tdConnection.ReqFactory;
  requirement = rFactory[requirementId];
  
  //Set the target releases of this requirement.
  requirement["RQ_TARGET_REL"] = listOfReleases;
  requirement.Post();

  //Retrieve the releases.
  outlistOfReleases = requirement["RQ_TARGET_REL"];
  strReleasesNames.Append("Releases are: ");
  foreach (Release rel in outlistOfReleases)
  {
    strReleasesNames.Append(rel.Name + ", ");
  }
  MessageBox.Show(strReleasesNames.ToString());
}