public async Task <CreateInvoiceResult> CreateInvoice(Invoice invoice) { var invoiceToml = Toml.FromModel(invoice, new TomlModelOptions() { ConvertPropertyName = name => TomlNamingHelper.PascalToCamelCase(name) }); var uri = new Uri(_baseUri, INVOICE_PATH); var requestContent = new StringContent(invoiceToml, null, "application/toml"); var response = await _httpClient.PostAsync(uri, requestContent); await ExpectResponseCode(response, HttpStatusCode.Created, HttpStatusCode.Accepted); var content = await response.Content.ReadAsStringAsync(); var syntax = GetTomlSyntax(content); var tomlOptions = new TomlModelOptions() { ConvertPropertyName = name => TomlNamingHelper.PascalToCamelCase(name) }; return(syntax.ToModel <CreateInvoiceResult>(tomlOptions)); }