I am trying to run the following line:

$query = New-Object Microsoft.SharePoint.Client.Search.Query.KeywordQuery($ctx)

and receive this error:

New-Object : Cannot find an overload for "KeywordQuery" and the argument count: "1".

1. I have added paths to SDK: Add-Type -Path "c:\Program Files\Common Files\microsoft shared\Web Server Extensions\16\ISAPI\Microsoft.SharePoint.Client.dll" Add-Type -Path "c:\Program Files\Common Files\microsoft shared\Web Server Extensions\16\ISAPI\Microsoft.SharePoint.Client.Runtime.dll" Add-Type -Path "c:\Windows\Microsoft.NET\assembly\GAC_MSIL\Microsoft.SharePoint.Client.Search\v4.0_16.0.0.0__71e9bce111e9429c\Microsoft.SharePoint.Client.Search.dll" Add-Type -Path "c:\Program Files\Common Files\microsoft shared\Web Server Extensions\16\ISAPI\Microsoft.SharePoint.Client.Search.dll"

Full code:

  $ctx=New-Object Microsoft.SharePoint.Client.ClientContext($Url)
  $ctx.Credentials = New-Object Microsoft.SharePoint.Client.SharePointOnlineCredentials($Username, $AdminPassword)
  catch [Net.WebException]

Write-Host $ctx.Web.Url
$query = New-Object Microsoft.SharePoint.Client.Search.Query.KeywordQuery($ctx)

2. The library is correct and sample code works in C# in Visual Studio:

static ClientContext ctx;
        static void Main(string[] args)


            ctx.Credentials = new SharePointOnlineCredentials(userName, ss);

        static void DoSomethingSearchish()
            KeywordQuery kQ = new KeywordQuery(ctx);
            kQ.QueryText = "prank";
            SearchExecutor searchExecutor = new SearchExecutor(ctx);
            ClientResult<ResultTableCollection> results = searchExecutor.ExecuteQuery(kQ);


            foreach (var resultRow in results.Value[0].ResultRows)

The Visual Studio code was originally copied from somewhere, altered and used by me, but I cannot find the source now - apologies to the author.

3. In Powershell, using different number of arguments for the constructor gives the following errors:

0 - ...Query.KeywordQuery

A constructor was not found. Cannot find an appropriate constructor for type Microsoft.SharePoint.Client.Search.Query.KeywordQuery

2 - ...Query.KeywordQuery($ctx, "")

New-Object : Cannot find an overload for "KeywordQuery" and the argument count: "2".

4. I am NOT running the code from SharePoint Online Management Shell (it is installed though) and I am NOT connected with Connect-SPOService.

Question: Why Powershell cannot find the constructor?

1 Answer 1


Works now. What helped:

  1. Close ISE.
  2. Close all Powershell windows (regardless whether they are connect to SPOService or not).
  3. Restart.

I think partial explanation for this is available in this post: Error creating PeopleManager object using CSOM in powershell

Restarting Powershell must have helped unload the wrong reference and load the correct assembly and appropriate constructor.

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