Unable to load RegionalSettings field/property Sharepoint CSOM

Unable to load RegionalSettings field/property Sharepoint CSOM

By : user2951682
Date : November 18 2020, 11:13 AM
To fix this issue Most probably this error occurs since you are using SharePoint Server 2013 Client Components SDK or SharePoint Online Client Components SDK against SharePoint 2010 .
Web class does not expose RegionalSettings property in SharePoint 2010 CSOM.
code :
Assembly assembly = Assembly.GetAssembly(typeof(ClientContext));
FileVersionInfo fvi = FileVersionInfo.GetVersionInfo(assembly.Location);
string version = fvi.FileVersion;
using (var ctx = new ClientContext(webUrl))
    var version = ctx.ServerLibraryVersion;

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Retrieve field groups from SharePoint CSOM

Retrieve field groups from SharePoint CSOM

Date : March 29 2020, 07:55 AM
wish helps you You can do it via Linq:
Distinct will sort the duplicates out of your result.
code :
var results = rootFields.ToList().Select(field => field.Group).Distinct();

foreach (var_group in results)
    fieldsList.Add(new SelectListItem { Text = _group });
Create field in SharePoint programmatically using CSOM (Not with XML)

Create field in SharePoint programmatically using CSOM (Not with XML)

By : TiFF
Date : March 29 2020, 07:55 AM
wish of those help That's doable, in the following example is introduced a FieldCreationInformation class:
code :
public class FieldCreationInformation
    public Guid Id { get; set; }

    public string DisplayName { get; set; }

    public string InternalName { get; set; }

    public bool AddToDefaultView { get; set; }

    //public IEnumerable<KeyValuePair<string, string>> AdditionalAttributes { get; set; }

    public FieldType FieldType { get; set; }

    public string Group { get; set; }

    public bool Required { get; set; }

    public string ToXml()
        var serializer = new XmlSerializer(GetType());
        var settings = new XmlWriterSettings();
        settings.Indent = true;
        settings.OmitXmlDeclaration = true;
        var emptyNamepsaces = new XmlSerializerNamespaces(new[] { XmlQualifiedName.Empty });

        using (var stream = new StringWriter())
        using (var writer = XmlWriter.Create(stream, settings))
            serializer.Serialize(writer, this, emptyNamepsaces);
            return stream.ToString();

    public FieldCreationInformation()
        Id = Guid.NewGuid();

public static class FieldCollectionExtensions
    public static Field Add(this FieldCollection fields, FieldCreationInformation info)
        var fieldSchema = info.ToXml();
        return fields.AddFieldAsXml(fieldSchema, info.AddToDefaultView, AddFieldOptions.AddFieldToDefaultView);
var fieldInfo = new FieldCreationInformation();
fieldInfo.FieldType = FieldType.Geolocation;
fieldInfo.InternalName = "ContactsLocation";
fieldInfo.DisplayName = "Contacts Location";
SharePoint CSOM PowerShell Does Not Return Web.Folders property

SharePoint CSOM PowerShell Does Not Return Web.Folders property

By : Haley Lewis
Date : March 29 2020, 07:55 AM
Any of those help Don't let this error message to confuse you. Even though this error usually occurs when the client object (folder collection) has not been requested from the server, in this particular case it occurs due to the line:
code :
$web = $ctx.Web
$folders = $web.Folders
if ($web.IsObjectPropertyInstantiated('Folders') -eq $true)
   Write-Host "Folder collection has been loaded"

$folders.GetEnumerator() | % { 
    Write-Host "Folder name: $($_.Name)" 
if($folders.Count -gt 0){
    $folder = $folders[0] #get first item
    Write-Host "Folder name: $($folder.Name)" 
SharePoint CSOM C# Load Query with Where Clause Performance

SharePoint CSOM C# Load Query with Where Clause Performance

By : Monique Smiling
Date : March 29 2020, 07:55 AM
Any of those help How does SharePoint CSOM handle this block of code? , it should pinpoint the single file if using code below:
code :
FileCollection allDocs = libFolder.Files.Where(file => file.Name == "test.docx");
clientContext.LoadQuery(allDocs); // IQueryable
// it should query on server and return only requested items without enumerating 
// whole library
// i think your code does the same, but im not sure here
// i personally prefer using syntax above
// note that im using LoadQuery, but not Load method

// you can select a single item like this without awkward allDocs[0] syntax
var singleDoc = allDocs.SingleOrDefault();
if (singleDoc != null) {
    // do something
Unable to authenticate SharePoint REST or CSOM calls from .NET Core

Unable to authenticate SharePoint REST or CSOM calls from .NET Core

By : altabrams
Date : March 29 2020, 07:55 AM
this will help The REST call is wrong. You have to get a token using the credentials. Also, the WebClient is mostly deprecated, use the HttpClient class instead.
Look at this example:
code :
public const string BaseUri = "https://example.sharepoint.com";
private static HttpClient _client;

public static void Initialize()
    SharePointOnlineCredentials currentCredentials = GetCredentialsHere();

    var handler = new HttpClientHandler
        Credentials = currentCredentials

    _client = new HttpClient(handler);

    // you are missing this line
    handler.CookieContainer.SetCookies(BaseUri, currentCredentials.GetAuthenticationCookie(BaseUri));
    _client.BaseAddress = BaseUri;
    _client.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));
    _client.MaxResponseContentBufferSize = 2147483647;
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