Code generation issue

GeneratedCode.cs

//----------------------
// <auto-generated>
//     Generated using the NSwag toolchain v11.17.21.0 (NJsonSchema v9.10.63.0 (Newtonsoft.Json v9.0.0.0)) (http://NSwag.org)
// </auto-generated>
//----------------------

namespace RailKit
{
    #pragma warning disable // Disable all warnings

    [System.CodeDom.Compiler.GeneratedCode("NSwag", "11.17.21.0 (NJsonSchema v9.10.63.0 (Newtonsoft.Json v9.0.0.0))")]
    public partial interface IClient
    {
        /// <summary>Summary.</summary>
        /// <returns>Something something response</returns>
        /// <exception cref="RailKitException">A server side error occurred.</exception>
        System.Threading.Tasks.Task<ExampleClass> TestGetAsync();
    
        /// <summary>Summary.</summary>
        /// <returns>Something something response</returns>
        /// <exception cref="RailKitException">A server side error occurred.</exception>
        ExampleClass TestGet();
    
        /// <summary>Summary.</summary>
        /// <returns>Something something response</returns>
        /// <exception cref="RailKitException">A server side error occurred.</exception>
        /// <param name="cancellationToken">A cancellation token that can be used by other objects or threads to receive notice of cancellation.</param>
        System.Threading.Tasks.Task<ExampleClass> TestGetAsync(System.Threading.CancellationToken cancellationToken);
    
    }
    
    [System.CodeDom.Compiler.GeneratedCode("NSwag", "11.17.21.0 (NJsonSchema v9.10.63.0 (Newtonsoft.Json v9.0.0.0))")]
    public partial class Client : BaseRailKitClient, IClient
    {
        private System.Lazy<Newtonsoft.Json.JsonSerializerSettings> _settings;
    
        public Client(string baseUrl)
        {
            BaseUrl = baseUrl; 
            _settings = new System.Lazy<Newtonsoft.Json.JsonSerializerSettings>(() => 
            {
                var settings = new Newtonsoft.Json.JsonSerializerSettings();
                UpdateJsonSerializerSettings(settings);
                return settings;
            });
        }
    
        protected Newtonsoft.Json.JsonSerializerSettings JsonSerializerSettings { get { return _settings.Value; } }
    
        partial void UpdateJsonSerializerSettings(Newtonsoft.Json.JsonSerializerSettings settings);
        partial void PrepareRequest(System.Net.Http.HttpClient client, System.Net.Http.HttpRequestMessage request, string url);
        partial void PrepareRequest(System.Net.Http.HttpClient client, System.Net.Http.HttpRequestMessage request, System.Text.StringBuilder urlBuilder);
        partial void ProcessResponse(System.Net.Http.HttpClient client, System.Net.Http.HttpResponseMessage response);
    
        /// <summary>Summary.</summary>
        /// <returns>Something something response</returns>
        /// <exception cref="RailKitException">A server side error occurred.</exception>
        public System.Threading.Tasks.Task<ExampleClass> TestGetAsync()
        {
            return TestGetAsync(System.Threading.CancellationToken.None);
        }
    
        /// <summary>Summary.</summary>
        /// <returns>Something something response</returns>
        /// <exception cref="RailKitException">A server side error occurred.</exception>
        public ExampleClass TestGet()
        {
            return System.Threading.Tasks.Task.Run(async () => await TestGetAsync(System.Threading.CancellationToken.None)).GetAwaiter().GetResult();
        }
    
        /// <summary>Summary.</summary>
        /// <returns>Something something response</returns>
        /// <exception cref="RailKitException">A server side error occurred.</exception>
        /// <param name="cancellationToken">A cancellation token that can be used by other objects or threads to receive notice of cancellation.</param>
        public async System.Threading.Tasks.Task<ExampleClass> TestGetAsync(System.Threading.CancellationToken cancellationToken)
        {
            var urlBuilder_ = new System.Text.StringBuilder();
            urlBuilder_.Append(BaseUrl != null ? BaseUrl.TrimEnd('/') : "").Append("/test");
    
            var client_ = new System.Net.Http.HttpClient();
            try
            {
                using (var request_ = new System.Net.Http.HttpRequestMessage())
                {
                    request_.Method = new System.Net.Http.HttpMethod("GET");
                    request_.Headers.Accept.Add(new System.Net.Http.Headers.MediaTypeWithQualityHeaderValue("application/json"));
    
                    PrepareRequest(client_, request_, urlBuilder_);
                    var url_ = urlBuilder_.ToString();
                    request_.RequestUri = new System.Uri(url_, System.UriKind.RelativeOrAbsolute);
                    PrepareRequest(client_, request_, url_);
    
                    var response_ = await client_.SendAsync(request_, System.Net.Http.HttpCompletionOption.ResponseHeadersRead, cancellationToken).ConfigureAwait(false);
                    try
                    {
                        var headers_ = System.Linq.Enumerable.ToDictionary(response_.Headers, h_ => h_.Key, h_ => h_.Value);
                        if (response_.Content != null && response_.Content.Headers != null)
                        {
                            foreach (var item_ in response_.Content.Headers)
                                headers_[item_.Key] = item_.Value;
                        }
    
                        ProcessResponse(client_, response_);
    
                        var status_ = ((int)response_.StatusCode).ToString();
                        if (status_ == "200") 
                        {
                            var responseData_ = response_.Content == null ? null : await response_.Content.ReadAsStringAsync().ConfigureAwait(false); 
                            var result_ = default(ExampleClass); 
                            try
                            {
                                result_ = Newtonsoft.Json.JsonConvert.DeserializeObject<ExampleClass>(responseData_, _settings.Value);
                                return result_; 
                            } 
                            catch (System.Exception exception_) 
                            {
                                throw new RailKitException("Could not deserialize the response body.", (int)response_.StatusCode, responseData_, headers_, exception_);
                            }
                        }
                        else
                        {
                            var responseData_ = response_.Content == null ? null : await response_.Content.ReadAsStringAsync().ConfigureAwait(false); 
                            var result_ = default(ExampleClass); 
                            try
                            {
                                result_ = Newtonsoft.Json.JsonConvert.DeserializeObject<ExampleClass>(responseData_, _settings.Value);
                            } 
                            catch (System.Exception exception_) 
                            {
                                throw new RailKitException("Could not deserialize the response body.", (int)response_.StatusCode, responseData_, headers_, exception_);
                            }
                            throw new RailKitException<ExampleClass>("Default response", (int)response_.StatusCode, responseData_, headers_, result_, null);
                        }
            
                        return default(ExampleClass);
                    }
                    finally
                    {
                        if (response_ != null)
                            response_.Dispose();
                    }
                }
            }
            finally
            {
                if (client_ != null)
                    client_.Dispose();
            }
        }
    
        private string ConvertToString(object value, System.Globalization.CultureInfo cultureInfo)
        {
            if (value is System.Enum)
            {
                string name = System.Enum.GetName(value.GetType(), value);
                if (name != null)
                {
                    var field = System.Reflection.IntrospectionExtensions.GetTypeInfo(value.GetType()).GetDeclaredField(name);
                    if (field != null)
                    {
                        var attribute = System.Reflection.CustomAttributeExtensions.GetCustomAttribute(field, typeof(System.Runtime.Serialization.EnumMemberAttribute)) 
                            as System.Runtime.Serialization.EnumMemberAttribute;
                        if (attribute != null)
                        {
                            return attribute.Value;
                        }
                    }
                }
            }
            else if (value is byte[])
            {
                return System.Convert.ToBase64String((byte[]) value);
            }
            else if (value != null && value.GetType().IsArray)
            {
                var array = System.Linq.Enumerable.OfType<object>((System.Array) value);
                return string.Join(",", System.Linq.Enumerable.Select(array, o => ConvertToString(o, cultureInfo)));
            }
        
            return System.Convert.ToString(value, cultureInfo);
        }
    }
    
    

    [System.CodeDom.Compiler.GeneratedCode("NJsonSchema", "9.10.63.0 (Newtonsoft.Json v9.0.0.0)")]
    public partial class ExampleClass 
    {
        [Newtonsoft.Json.JsonProperty("property", Required = Newtonsoft.Json.Required.Default, NullValueHandling = Newtonsoft.Json.NullValueHandling.Ignore)]
        public string Property { get; set; }
    
    
    }

}

test.yaml

swagger: '2.0'
info:
  title: Code generation issue
  version: v0.0.1
paths:
  /test:
    get:
      summary: Summary.
      description: Description.
      responses:
        "200":
          description: Something something response
          schema:
            $ref: '#/definitions/ExampleClass'
        default:
          description: Default response
          schema:
            $ref: '#/definitions/ExampleClass'
definitions:
  ExampleClass:
    type: object
    properties:
      property:
          type: string