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How to filter Email Messages by Subject Body & HasAttachments using C# Graph API

var inboxMessages = await graphClient.Me
.MailFolders["Inbox"]
.Messages
.Request()
.Select("sender,subject")
.Top(5)
.GetAsync();
I want to filter the messages by subject and hasAttachment using C#
I am seeing few examples like this ,but how we need implement this in C# in above code?
/v1.0/me/messages?$search="subject:search term"
/v1.0/me/messages?$filter=contains(subject, 'my search term')
Can anyone help me out on this.

You can filter messages with attachments based on the subject that contains specific text like this
var subjectText = "your text";
var inboxMessages = await graphClient.Me
.MailFolders["Inbox"]
.Messages
.Request()
.Select("sender,subject")
.Filter($"hasAttachments eq true and contains(subject,'{subjectText}')")
.Top(5)
.GetAsync();
Documentation:
$filter query operator

Copy a mail using Microsoft Graph C# SDK

I want to copy a mail from one folder to another.
Referring to the documentation, it should work like this:
var graphClient = new GraphServiceClient(authProvider);
var destinationId = "destinationId-value";
await graphClient.Me.Messages["{message-id}"]
.Copy(destinationId)
.Request()
.PostAsync();
However, when I try to use .Copy() like described I get the error, that I can't use it like a method. If I try to add the information as an [], like it's done for the users or messages property, I receive a different error.
I have tried it like this:
var graphClient = GetGraphClientInstance();
var destinationFolderId = "destinationFolderId-value";
await graphClient.Users["myUserName"].Messages[specificMail.Id]
.Copy(destinationFolderId )
.Request()
.PostAsync();
I'm using Microsoft.Graph version 5.0.0-preview-12.
Does anyone have an idea how to use the Copy property correctly?

Using Microsoft.Graph v5 your original code:
var graphClient = new GraphServiceClient(authProvider);
var destinationId = "destinationId-value";
await graphClient.Me.Messages["{message-id}"]
.Copy(destinationId)
.Request()
.PostAsync();
should be changed to:
var graphClient = new GraphServiceClient(authProvider);
var destinationId = "destinationId-value";
await graphClient.Users["myUserName"].Messages[specificMail.Id]
.MicrosoftGraphCopy
.PostAsync(new CopyPostRequestBody { DestinationId = destinationId });

GraphServiceClient Select control not working as expected

The following piece of code returns a lot more fields than the ones I´ve specified.
var user = await graphClient.Users["{user-id}"]
.Request()
.Select(u => new {
u.DisplayName,
u.JobTitle,
u.GivenName,
u.PostalCode,
u.Identities
})
.GetAsync();
I am following the instructions from ms docs stated here. What am I missing?

Microsoft Graph Get All Users Exception Unsupported Query

I can submit this query to Microsoft Graph Explorer but in C# I get the an error message: "Microsoft.Graph.ServiceException: "Code: Request_UnsupportedQuery
Message: Unsupported Query."
var users = await graphClient.Users
.Request()
.Filter("endswith(mail,'#mydomain.com')")
.OrderBy("userPrincipalName")
.GetAsync();

You should send a header ConsistencyLevel=eventual and also $count query parameter to make it work.
To add $count query parameter you can use queryOptions.
List<QueryOption> queryOptions = new List<QueryOption>
{
new QueryOption("$count", true)
};
var users = await graphClient.Users
.Request(queryOptions)
.Filter("endswith(mail,'#mydomain.com')")
.OrderBy("userPrincipalName")
.GetAsync();
The API call what look something like this
https://graph.microsoft.com/v1.0/users?$count=true&$filter=endswith(mail, '#domain.live')&$orderBy=userPrincipalName
You can always test these calls in Graph Explorer.

QueryOptions ignored when getting calendar events in MSGraph Dot Net

I'm trying to get the user's calendar events for today. So I added some query parameters but they're getting ignored and the graph client returns the user's events as if I didn't supply any parameters (startatetime):
var options = new QueryOption[]
{
new QueryOption("startdatetime", DateTime.UtcNow.ToString("o")),
new QueryOption("enddatetime", DateTime.UtcNow.AddDays(1).ToString("o")),
};
var events = await graphServiceClient
.Me
.Calendar
.Events
.Request(options)
.GetAsync();
I tested it in the graph explorer and it works fine. But in the sdk, it returns calendar events that started before today.

Your code is the equivalent of calling:
`/events?startdatetime={dateTime}&enddatetime={dateTime}`.
That is a valid endpoint, but you're passing invalid query params. What you're looking for is calendarView:
`/calendarView?startdatetime={dateTime}&enddatetime={dateTime}`
Using the SDK, this would look like this:
var options = new QueryOption[]
{
new QueryOption("startDateTime", DateTime.UtcNow.ToString("o")),
new QueryOption("endDateTime", DateTime.UtcNow.AddDays(1).ToString("o")),
};
var events = await graphServiceClient
.Me
.CalendarView
.Request(options)
.GetAsync();