graphapi filter

Hi @abhishek appu

I tested locally and it worked fine. Please refer to my code:

using Azure.Identity;  
using Microsoft.Graph;  
using Newtonsoft.Json;  
  
var scopes = new[] { "https://graph.microsoft.com/.default" };  
  
// Multi-tenant apps can use "common",  
// single-tenant apps must use the tenant ID from the Azure portal  
var tenantId = "tenant id";  
  
// Values from app registration  
var clientId = " client id";  
var clientSecret = "client secret";  
  
// using Azure.Identity;  
var options = new TokenCredentialOptions  
{  
    AuthorityHost = AzureAuthorityHosts.AzurePublicCloud  
};  
  
// https://learn.microsoft.com/dotnet/api/azure.identity.clientsecretcredential  
var clientSecretCredential = new ClientSecretCredential(  
    tenantId, clientId, clientSecret, options);  
  
var graphClient = new GraphServiceClient(clientSecretCredential, scopes);  
  
var messages = await graphClient.Users["xxxxxxxxx.onmicrosoft.com"].MailFolders["Inbox"].Messages  
    .Request()  
    .Filter("isRead eq false and from/emailAddress/address eq '******@xxxxxxx.onmicrosoft.com' and subject eq 'This is a test message'")  
    .Select("body,subject,sender,from")  
    .Top(1000)  
    .GetAsync();  
 
Console.WriteLine("messages:" + JsonConvert.SerializeObject(messages));  

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