Post byte array to Web API server using HttpClient

Question

I want to post this data to Web API server:

public sealed class SomePostRequest
{
    public int Id { get; set; }
    public byte[] Content { get; set; }
}
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Answer 1

Fyi, for protobuf serialization to request body posts

        LoginRequest loginRequest = new LoginRequest()
        {
            Code = "UserId",
            Password = "myPass",
            CMToken = "eIFt4lYTKGU:APA91bFZPe3XCDL2r1JUJuEQLlN3FoeFw9ULpw8ljEavNdo9Lc_-Qua4w9pTqdOFLTb92Kf03vyWBqkcvbBfYEno4NQIvp21kN9sldDt40eUOdy0NgMRXf2Asjp6FhOD1Kmubx1Hq7pc",
        };
        byte[] rawBytes = ProtoBufSerializer.ProtoSerialize(loginRequest);

        var client = new HttpClient();
        client.BaseAddress = new Uri("http://localhost:9000/");
        client.DefaultRequestHeaders.Accept.Clear();
        client.DefaultRequestHeaders.Accept.Add(
            new MediaTypeWithQualityHeaderValue("application/x-protobuf"));

        //var bSonData = HttpExtensions.SerializeBson(data);
        var byteArrayContent = new ByteArrayContent(rawBytes);
        byteArrayContent.Headers.ContentType = new MediaTypeHeaderValue("application/x-protobuf");

        var result = client.PostAsync("Api/Login", byteArrayContent).Result;

        Console.WriteLine(result.IsSuccessStatusCode);