BurstX

<#
.SYNOPSIS
    Tht script checks is a site policy exists in a site collection.
.DESCRIPTION

.PARAMETER SiteUrl
    URL of a site collection to check the policy existence.
.PARAMETER PolicyName
    Name of the policy to check.
#>

BurstX

$spWeb = Get-SPWeb $SiteUrl 

# Check whether site is closed
$isClosed = [Microsoft.Office.RecordsManagement.InformationPolicy.ProjectPolicy]::IsProjectClosed($spWeb)

if($isClosed)
{
    [Microsoft.Office.RecordsManagement.InformationPolicy.ProjectPolicy]::OpenProject($spWeb)
}    

BurstX

using (var ctx = new ClientContext(this.SiteCollectionUri)) // TEST root site collection URL
{
  ctx.ExecutingWebRequest += (object sender, WebRequestEventArgs e) =>
  {
      // e.WebRequestExecutor.WebRequest.UserAgent = @"Mozilla/4.0 (compatible; MSIE 4.01; windows NT; MS Search 6.0 Robot)";
      e.WebRequestExecutor.WebRequest.Headers.Add(@"X-FORMS_BASED_AUTH_ACCEPTED", @"f");
  };

  var query = new KeywordQuery(ctx);
  query.QueryText = "WebTemplate:STS";