Public static DataSet Gethistory(string siteurl, string listName, int Id)
{
  Using (ClientContext ctx = new ClientContext(siteUrl))
  {
    Var file = ctx.Web.Lists.GetByTitle(listName).GetItemId(Id).File;
    Var versions = file.Versions;
    Ctx.Load(file);
    Ctx.Load(versions);
    Ctx.Load(versions, vs => vs.Include(v => v.CreatedBy))
    Ctx.ExecuteQuery();
  }
}