'System.MissingMethodException: Method not found: 'System.String Microsoft.SharePoint.Client.Site.get_Classification()' in csom package

Question

I'm facing method not found exception while accessing the some properties in Microsoft.SharePoint.Client.Site

Answer 1

Hi @Dineshkumar T,

Per my test, there is no Microsoft.SharePoint.Client.Site.get_Classification() function in CSOM. If you want to get site classification, you could refer to following code

// Connect to the admin central of your tenant
using (var adminContext = new ClientContext("https://[tenant]-admin.sharepoint.com/"))
{
    // Provide a valid set of credentials
    adminContext.Credentials = OfficeDevPnP.Core.Utilities.CredentialManager.GetSharePointOnlineCredential("[name-of-your-credentials]");
    // Create a new instance of the Tenant class of CSOM
    var tenant = new Tenant(adminContext);
    // Get an Azure AD Access Token using ADAL, MSAL, or whatever else you like
    var accessToken = getAzureADAccessToken();
    // Retrieve the current set of values for site classification
    var classificationList = tenant.GetSiteClassificationList(accessToken); 
}

Here is the document for details

https://learn.microsoft.com/en-us/sharepoint/dev/solution-guidance/modern-experience-site-classification

https://learn.microsoft.com/en-us/previous-versions/office/sharepoint-csom/mt796389(v=office.15)

---

If the answer is helpful, please click "Accept Answer" and kindly upvote it. If you have extra questions about this answer, please click "Comment".

Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.