public void Cleanup()
        {
            using (var ctx = TestCommon.CreateClientContext())
            {
                ctx.Load(ctx.Web, w => w.ServerRelativeUrl);
                ctx.ExecuteQueryRetry();

                TestCommon.DeleteFile(ctx, UrlUtility.Combine(ctx.Web.ServerRelativeUrl, "/SitePages/csp-test-1.aspx"));
                TestCommon.DeleteFile(ctx, UrlUtility.Combine(ctx.Web.ServerRelativeUrl, "/SitePages/csp-test-2.aspx"));
                TestCommon.DeleteFile(ctx, UrlUtility.Combine(ctx.Web.ServerRelativeUrl, "/SitePages/csp-test-3.aspx"));
            }
        }