MS Graph Create open extension call with Json object - microsoft-graph-api

Question

I am trying to create events using MS Graph. We are using json objects with the call as in this example
using (HttpClient httpClient = new HttpClient())
{
ServicePointManager.SecurityProtocol = SecurityProtocolType.Tls12;
httpClient.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("Bearer", msBearerToken);
var callJson = new
{
Subject = EventSummery.Title,
Body = new
{
ContentType = BodyType.Html.ToString(),
Content = EventSummery.Description
},
Start = new
{
DateTime = EventSummery.StartDateUTC.ToString("yyyy-MM-ddTHH:mm:ss"),
TimeZone = "GMT Standard Time"
},
End = new
{
DateTime = EventSummery.EndDateUTC.ToString("yyyy-MM-ddTHH:mm:ss"),
TimeZone = "GMT Standard Time"
}
};
I need to add an open extension however the documentation I need to add this attribute
"extensions": [
{
"#odata.type": "microsoft.graph.openTypeExtension",
"extensionName": "Com.Contoso.Referral",
"companyName": "Wingtip Toys",
"expirationDate": "2015-12-30T11:00:00.000Z",
"dealValue": 10000
}]
however #odata.type throws an error if I put it in this form:
Extensions = new
{
"#odata.type": "microsoft.graph.openTypeExtension",
"extensionName": "Com.Contoso.Referral",
"companyName": "Wingtip Toys",
"expirationDate": "2015-12-30T11:00:00.000Z",
"dealValue": 10000
}
What am I missing how can I make this call successfully?

Answer 1

I'm afraid that you cannot create anonymous object with property that has a special character at the beginning.
Only way is to create a class with properties that have JsonPropertyName attribute and then use json serializer.
public class OpenTypeExtension
{
[JsonPropertyName("#odata.type")]
public string ODataType { get; set; }
[JsonPropertyName("extensionName")]
public string ExtensionName { get; set; }
[JsonPropertyName("companyName")]
public string CompanyName { get; set; }
[JsonPropertyName("expirationDate")]
public string ExpirationDate{ get; set; }
[JsonPropertyName("dealValue")]
public string DealValue{ get; set; }
public OpenTypeExtension()
{
ODataType = "microsoft.graph.openTypeExtension";
}
}