Status 400 bad request for creating a record in crm dynamics 365

Question

I am developing web application, that interact with crm dynamics 365, im facing the error while creating a record (post method) get method is working fine i am able to fetch the records from crm,

I am not sure its a correct community to ask here.

 

string resource = "https://*****.crm4.dynamics.com/";

UserCredential clientredentials = new UserCredential("****t@******onmicrosoft.com", "****@716");

string client_id = "2b572be0-*****-4581-8481-*******";

AuthenticationContext authenticationContext = new AuthenticationContext("https://login.microsoftonline.com/2ce71a2c-f78d-45c8-9d23-****f/oauth2/v2.0/authorize");

AuthenticationResult authenticationResult = authenticationContext.AcquireToken(resource, client_id, clientredentials);

ServicePointManager.SecurityProtocol = SecurityProtocolType.Tls12;

HttpClient httpClient = new HttpClient();

httpClient.DefaultRequestHeaders.Add("OData-MaxVersion", "4.0");

httpClient.DefaultRequestHeaders.Add("OData-Version", "4.0");

httpClient.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));

httpClient.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("Bearer", authenticationResult.AccessToken);

httpClient.BaseAddress = new Uri("https://orgf65ea8ad.api.crm4.dynamics.com/api/data/v9.2/");

account_creation_1 ac_1 = new account_creation_1()

{

name = account_Creation.name,

preetham_reasonforregistration = account_Creation.reason_for_registration,

preetham_DepartmentId = Guid.Parse(account_Creation.Department),

preetham_doctorId = Guid.Parse(account_Creation.Doctor)

};

HttpRequestMessage request = new HttpRequestMessage(HttpMethod.Post,new Uri("https://*****.api.crm4.dynamics.com/api/data/v9.2/accounts"))

{

Content = new StringContent(ac_1.ToString(), Encoding.UTF8, "application/json")

};

var response = httpClient.SendAsync(request, HttpCompletionOption.ResponseContentRead).Result;

if (response.IsSuccessStatusCode)

{

Console.Write("Account Created");

}

}

I have tested url is correct and i am getting the access token, everything works fine, can anyone help me where i am wrong