diff --git a/config/csharp.yaml b/config/csharp.yaml
index 213292c4..cf3d5561 100644
--- a/config/csharp.yaml
+++ b/config/csharp.yaml
@@ -1,5 +1,7 @@
 changelog:
-  - 1.3.1 (2024-02-19): 
+  - 1.4.0 (2024-06-11):
+    - .net 5.0 support
+  - 1.3.1 (2024-02-19):
     - Update VideoStatusIngest enum
   - 1.3.0 (2023-06-28):
     - Introducing new live streams restream feature
diff --git a/templates/csharp/ApiClient.mustache b/templates/csharp/ApiClient.mustache
index acae4d48..3143202a 100644
--- a/templates/csharp/ApiClient.mustache
+++ b/templates/csharp/ApiClient.mustache
@@ -30,6 +30,10 @@ namespace {{packageName}}.Client
         private const int DEFAULT_CHUNK_SIZE = {{ defaultChunkSize }};
         private const int MIN_CHUNK_SIZE = {{ minChunkSize }};
         private const int MAX_CHUNK_SIZE = {{ maxChunkSize }};
+        private int timeout = 60000;
+        private String basePath = "ws.api.video";
+        private Dictionary<string, string> originHeaders = new Dictionary<string, string>();
+
 
         private readonly JsonSerializerSettings serializerSettings = new JsonSerializerSettings
         {
@@ -47,7 +51,7 @@ namespace {{packageName}}.Client
         /// Allows for extending request processing for <see cref="ApiClient"/> generated code.
         /// </summary>
         /// <param name="request">The RestSharp request object</param>
-        private RestRequest InterceptRequest(IRestRequest request){
+        private RestRequest InterceptRequest(RestRequest request){
             if(AuthManager != null)
                 return AuthManager.Intercept(request) as RestRequest;
             return request as RestRequest;
@@ -58,7 +62,15 @@ namespace {{packageName}}.Client
         /// Constructor for ApiClient with custom basePath
         /// </summary>
         /// <param name="basePath">the api base path.</param>
-        public ApiClient(string basePath): this(new RestClient(basePath)) {
+        public ApiClient(string basePath) {
+            var options = new RestClientOptions()
+            {
+                ThrowOnAnyError = true,
+                BaseUrl = new Uri(basePath)
+            };
+            RestClient client = new RestClient(options);
+
+            Initialize(client);
         }
         
         /// <summary>
@@ -75,7 +87,14 @@ namespace {{packageName}}.Client
         /// Constructor for ApiClient with custom http client.
         /// </summary>
         /// <param name="client">a RestClient instance used to make API call</param>
-        public ApiClient(RestClient client) {
+        public ApiClient(IRestClient client) {
+            Initialize(client);
+
+        }
+
+
+        private void Initialize(IRestClient client)
+        {
             this.RestClient = client;
             setName("AV-Origin-Client", "csharp", "{{ artifactVersion }}");
         }
@@ -121,7 +140,7 @@ namespace {{packageName}}.Client
                throw new Exception("Invalid version value. The version should match the xxx[.yyy][.zzz] pattern.");
             }
 
-            this.RestClient.AddDefaultHeader(key, name + ":" + version);
+            this.originHeaders.Add(key, name + ":" + version);
         }
 
         private bool isValidName(string name)
@@ -141,7 +160,7 @@ namespace {{packageName}}.Client
         /// </summary>
         /// <returns> Timeout in milliseconds</returns>
         public int GetTimeout() {
-            return this.RestClient.Timeout;
+            return ((int)this.timeout);
         }
 
         /// <summary>
@@ -153,7 +172,7 @@ namespace {{packageName}}.Client
         public ApiClient SetTimeout(int connectionTimeout) {
             // set timeout
             {{#netStandard}}RestClient.Timeout = TimeSpan.FromMilliseconds(connectionTimeout);{{/netStandard}}
-            {{^netStandard}}RestClient.Timeout = connectionTimeout;{{/netStandard}}
+            {{^netStandard}}this.timeout = connectionTimeout;{{/netStandard}}
             return this;
         }
 
@@ -161,13 +180,13 @@ namespace {{packageName}}.Client
         /// Gets or sets the RestClient.
         /// </summary>
         /// <value>An instance of the RestClient</value>
-        public RestClient RestClient { get; set; }
+        public IRestClient RestClient { get; set; }
 
         /// <summary>
         /// Sets the api base path.
         /// </summary>
         public void SetBasePath(string basePath) {
-            this.RestClient.BaseUrl = new Uri(basePath);
+            this.basePath = basePath;
         }
 
 
@@ -196,6 +215,7 @@ namespace {{packageName}}.Client
             string contentType)
         {
             var request = new RestRequest(path, method);
+            request.Timeout = new TimeSpan(0, 0, this.timeout);
             {{#netStandard}}
             // disable ResetSharp.Portable built-in serialization
             request.Serializer = null;
@@ -209,6 +229,9 @@ namespace {{packageName}}.Client
             foreach(var param in headerParams)
                 request.AddHeader(param.Key, param.Value);
 
+            foreach(var param in this.originHeaders)
+                request.AddHeader(param.Key, param.Value);
+
             // add query parameter, if any
             foreach(var param in queryParams)
                 request.AddQueryParameter(param.Key, param.Value);
@@ -225,7 +248,7 @@ namespace {{packageName}}.Client
                 {{/netStandard}}
                 {{^netStandard}}
                 {{^supportsUWP}}
-                request.AddFile(param.Value.Name, param.Value.Writer, param.Value.FileName, param.Value.ContentType);
+                request.AddFile(param.Value.Name, param.Value.GetFile, param.Value.FileName, param.Value.ContentType);
                 {{/supportsUWP}}
                 {{#supportsUWP}}
                 byte[] paramWriter = null;
@@ -281,7 +304,7 @@ namespace {{packageName}}.Client
             {{/supportsUWP}}
             {{#supportsUWP}}
             // Using async method to perform sync call (uwp-only)
-            var response = RestClient.ExecuteTaskAsync(request).Result;
+            var response = RestClient.ExecuteAsync(request).Result;
             {{/supportsUWP}}
             {{/netStandard}}
             this.CheckResponse(response);
@@ -293,7 +316,7 @@ namespace {{packageName}}.Client
         /// Check if the api call response was successful
         /// </summary>
         /// <param name="response">The response to check</param>
-        private void CheckResponse(IRestResponse response)
+        private void CheckResponse(RestResponse response)
         {
             if (response.ResponseStatus != ResponseStatus.Completed)
             {
@@ -339,7 +362,7 @@ namespace {{packageName}}.Client
                 path, method, queryParams, postBody, headerParams, formParams, fileParams,
                 pathParams, contentType);
             request = InterceptRequest(request);
-            var response = await RestClient.Execute{{^netStandard}}TaskAsync{{/netStandard}}(request, cancellationToken);
+            var response = await RestClient.Execute{{^netStandard}}Async{{/netStandard}}(request, cancellationToken);
             return (Object)response;
         }{{/supportsAsync}}
 
@@ -404,9 +427,9 @@ namespace {{packageName}}.Client
         /// <param name="response">The HTTP response.</param>
         /// <param name="type">Object type.</param>
         /// <returns>Object representation of the JSON string.</returns>
-        public object Deserialize(IRestResponse response, Type type)
+        public object Deserialize(RestResponse response, Type type)
         {
-            {{^netStandard}}IList<Parameter>{{/netStandard}}{{#netStandard}}IHttpHeaders{{/netStandard}} headers = response.Headers;
+            IReadOnlyCollection<Parameter> headers = response.Headers;
             if (type == typeof(byte[])) // return byte array
             {
                 return response.RawBytes;
diff --git a/templates/csharp/ApiVideoClient.mustache b/templates/csharp/ApiVideoClient.mustache
index cd12fcf3..0dd95700 100644
--- a/templates/csharp/ApiVideoClient.mustache
+++ b/templates/csharp/ApiVideoClient.mustache
@@ -54,7 +54,7 @@ namespace {{packageName}}.Client
         /// Build an instance that targets the production environment using a custom OkHttp client
         /// </summary>
         /// <param name="client">the RestClient instance to use</param>
-        public ApiVideoClient(RestClient client) : this(new ApiClient(client))
+        public ApiVideoClient(IRestClient client) : this(new ApiClient(client))
         { 
         }
 
@@ -107,7 +107,7 @@ namespace {{packageName}}.Client
         /// <returns>The rest client timeout</returns>
         public int GetTimeout()
         {
-            return this.apiClient.RestClient.Timeout;
+            return this.apiClient.GetTimeout();
         }
 
         /// <summary>
@@ -116,7 +116,7 @@ namespace {{packageName}}.Client
         /// <param name="newTimeOut">the new timeout</param>
         public void SetTimeout(int newTimeOut)
         {
-            this.apiClient.RestClient.Timeout = newTimeOut;
+            this.apiClient.SetTimeout(newTimeOut);
         }
 
         /// <summary>
diff --git a/templates/csharp/AssemblyInfo.mustache b/templates/csharp/AssemblyInfo.mustache
index bf80d7d4..9c8f9fdf 100644
--- a/templates/csharp/AssemblyInfo.mustache
+++ b/templates/csharp/AssemblyInfo.mustache
@@ -1,15 +1,6 @@
 using System.Reflection;
 using System.Runtime.InteropServices;
 
-// General Information about an assembly is controlled through the following
-// set of attributes. Change these attribute values to modify the information
-// associated with an assembly.
-[assembly: AssemblyTitle("{{packageTitle}}")]
-[assembly: AssemblyDescription("{{packageDescription}}")]
-[assembly: AssemblyConfiguration("")]
-[assembly: AssemblyCompany("{{packageCompany}}")]
-[assembly: AssemblyProduct("{{packageProductName}}")]
-[assembly: AssemblyCopyright("{{packageCopyright}}")]
 [assembly: AssemblyTrademark("")]
 [assembly: AssemblyCulture("")]
 
@@ -17,16 +8,3 @@ using System.Runtime.InteropServices;
 // to COM components.  If you need to access a type in this assembly from
 // COM, set the ComVisible attribute to true on that type.
 [assembly: ComVisible(false)]
-
-// Version information for an assembly consists of the following four values:
-//
-//      Major Version
-//      Minor Version
-//      Build Number
-//      Revision
-//
-// You can specify all the values or you can default the Build and Revision Numbers
-// by using the '*' as shown below:
-// [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("{{packageVersion}}")]
-[assembly: AssemblyFileVersion("{{packageVersion}}")]
diff --git a/templates/csharp/AuthenticationManager.mustache b/templates/csharp/AuthenticationManager.mustache
index 24476be1..b74139cc 100644
--- a/templates/csharp/AuthenticationManager.mustache
+++ b/templates/csharp/AuthenticationManager.mustache
@@ -36,7 +36,7 @@ namespace {{packageName}}.Client
         /// </summary>
         /// <param name="request">The request to update</param>
         /// <returns>The request updated</returns>
-        public IRestRequest Intercept(IRestRequest request){
+        public RestRequest Intercept(RestRequest request){
 
             if(request.Resource.Equals("/auth/api-key")) {
                 return request;
diff --git a/templates/csharp/Project.mustache b/templates/csharp/Project.mustache
index 74474939..114730b8 100644
--- a/templates/csharp/Project.mustache
+++ b/templates/csharp/Project.mustache
@@ -1,4 +1,3 @@
-<?xml version="1.0" encoding="utf-8"?>
 <!--
 {{#appName}}
 {{{appName}}}
@@ -11,32 +10,11 @@
 {{#version}}The version of the OpenAPI document: {{version}}{{/version}}
 {{#infoEmail}}Contact: {{{infoEmail}}}{{/infoEmail}}
 -->
-<Project ToolsVersion="{{^netStandard}}12.0{{/netStandard}}{{#netStandard}}14.0{{/netStandard}}" DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+<Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
+    <TargetFramework>net5.0</TargetFramework>
     {{#netStandard}}<MinimumVisualStudioVersion>14.0</MinimumVisualStudioVersion>{{/netStandard}}
-    <Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration>
-    <Platform Condition=" '$(Platform)' == '' ">AnyCPU</Platform>
-    <ProjectGuid>{{packageGuid}}</ProjectGuid>
     <OutputType>Library</OutputType>
-    <AppDesignerFolder>Properties</AppDesignerFolder>
-    <RootNamespace>{{packageName}}</RootNamespace>
-    <AssemblyName>{{packageName}}</AssemblyName>
-    {{#netStandard}}
-    <ProjectTypeGuids>{786C830F-07A1-408B-BD7F-6EE04809D6DB};{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}</ProjectTypeGuids>
-    <TargetFrameworkVersion>{{targetFramework}}</TargetFrameworkVersion>
-    {{/netStandard}}
-    {{^netStandard}}
-    {{^supportsUWP}}
-    <TargetFrameworkVersion>{{targetFramework}}</TargetFrameworkVersion>
-    {{/supportsUWP}}
-    {{#supportsUWP}}
-    <TargetPlatformIdentifier>UAP</TargetPlatformIdentifier>
-    <TargetPlatformVersion>10.0.10240.0</TargetPlatformVersion>
-    <TargetPlatformMinVersion>10.0.10240.0</TargetPlatformMinVersion>
-    <MinimumVisualStudioVersion>14</MinimumVisualStudioVersion>
-    {{/supportsUWP}}
-    {{/netStandard}}
-    <FileAlignment>512</FileAlignment>
     <PackOnBuild>true</PackOnBuild>
     <PackageId>{{packageName}}</PackageId>
     <PackageVersion>{{artifactVersion}}</PackageVersion>
@@ -45,89 +23,35 @@
     <DevelopmentDependency>true</DevelopmentDependency>
     <PackageLicenseExpression>MIT</PackageLicenseExpression>
     <PackageProjectUrl>{{artifactUrl}}</PackageProjectUrl>
+    <GenerateAssemblyInfo>false</GenerateAssemblyInfo>
+    <AssemblyTitle>api.video API client</AssemblyTitle>
+    <Company>api.video</Company>
+    <Product>ApiVideoApiCLient</Product>
+    <Copyright>No Copyright</Copyright>
+    <AssemblyVersion>1.0.0</AssemblyVersion>
+    <FileVersion>1.0.0</FileVersion>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
-    <DebugSymbols>true</DebugSymbols>
-    <DebugType>full</DebugType>
-    <Optimize>false</Optimize>
-    <OutputPath>bin\Debug\</OutputPath>
-    <DefineConstants>DEBUG;TRACE</DefineConstants>
-    <ErrorReport>prompt</ErrorReport>
-    <WarningLevel>4</WarningLevel>
     <DocumentationFile>bin\Debug\{{packageName}}.xml</DocumentationFile>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' ">
-    <DebugType>pdbonly</DebugType>
-    <Optimize>true</Optimize>
-    <OutputPath>bin\Release\</OutputPath>
-    <DefineConstants>TRACE</DefineConstants>
-    <ErrorReport>prompt</ErrorReport>
-    <WarningLevel>4</WarningLevel>
     <DocumentationFile>bin\Release\{{packageName}}.xml</DocumentationFile>
   </PropertyGroup>
+  <PropertyGroup>
+    <EnableDefaultItems>true</EnableDefaultItems>
+  </PropertyGroup>
   <ItemGroup>
-    {{^netStandard}}
-    <Reference Include="System" />
-    <Reference Include="System.Core" />
-    <Reference Include="System.Xml.Linq" />
-    <Reference Include="System.Data.DataSetExtensions" />
-    <Reference Include="System.ComponentModel.DataAnnotations" />
-    <Reference Include="Microsoft.CSharp" />
-    <Reference Include="System.Data" />
-    <Reference Include="System.Runtime.Serialization" />
-    <Reference Include="System.Xml" />
-    <Reference Include="Newtonsoft.Json">
-      <HintPath Condition="Exists('$(SolutionDir)\packages')">$(SolutionDir)\packages\Newtonsoft.Json.{{newtonsoft-json.version}}\lib\{{newtonsoft-json.targetFramework}}\Newtonsoft.Json.dll</HintPath>
-      <HintPath Condition="Exists('..\packages')">..\packages\Newtonsoft.Json.{{newtonsoft-json.version}}\lib\{{newtonsoft-json.targetFramework}}\Newtonsoft.Json.dll</HintPath>
-      <HintPath Condition="Exists('..\..\packages')">..\..\packages\Newtonsoft.Json.{{newtonsoft-json.version}}\lib\{{newtonsoft-json.targetFramework}}\Newtonsoft.Json.dll</HintPath>
-        <HintPath Condition="Exists('..\..\vendor')">..\..\vendor\Newtonsoft.Json.{{newtonsoft-json.version}}\lib\net45\Newtonsoft.Json.dll</HintPath>
-    </Reference>
-    <Reference Include="JsonSubTypes">
-      <HintPath Condition="Exists('$(SolutionDir)\packages')">$(SolutionDir)\packages\JsonSubTypes.{{json-subtypes.version}}\lib\{{json-subtypes.targetFramework}}\JsonSubTypes.dll</HintPath>
-      <HintPath Condition="Exists('..\packages')">..\packages\JsonSubTypes.{{json-subtypes.version}}\lib\{{json-subtypes.targetFramework}}\JsonSubTypes.dll</HintPath>
-      <HintPath Condition="Exists('..\..\packages')">..\..\packages\JsonSubTypes.{{json-subtypes.version}}\lib\{{json-subtypes.targetFramework}}\JsonSubTypes.dll</HintPath>
-      <HintPath Condition="Exists('..\..\vendor')">..\..\vendor\JsonSubTypes.{{json-subtypes.version}}\lib\{{json-subtypes.targetFramework}}\JsonSubTypes.dll</HintPath>
-    </Reference>
-    <Reference Include="RestSharp">
-      <HintPath Condition="Exists('$(SolutionDir)\packages')">$(SolutionDir)\packages\RestSharp.{{restsharp.version}}\lib\{{restsharp.targetFramework}}\RestSharp.dll</HintPath>
-      <HintPath Condition="Exists('..\packages')">..\packages\RestSharp.{{restsharp.version}}\lib\{{restsharp.targetFramework}}\RestSharp.dll</HintPath>
-      <HintPath Condition="Exists('..\..\packages')">..\..\packages\RestSharp.{{restsharp.version}}\lib\{{restsharp.targetFramework}}\RestSharp.dll</HintPath>
-      <HintPath Condition="Exists('..\..\vendor')">..\..\vendor\RestSharp.{{restsharp.version}}\lib\{{restsharp.targetFramework}}\RestSharp.dll</HintPath>
-    </Reference>
-    {{#generatePropertyChanged}}
-    <Reference Include="PropertyChanged">
-      <HintPath>..\..\packages\PropertyChanged.Fody.{{propertychanged-fody.version}}\Lib\portable-net4+sl4+wp8+win8+wpa81+MonoAndroid16+MonoTouch40\PropertyChanged.dll</HintPath>
-    </Reference>
-    {{/generatePropertyChanged}}
-    {{/netStandard}}
-    {{#netStandard}}
-    <!-- A reference to the entire .NET Framework is automatically included -->
-    <None Include="project.json" />
-    {{/netStandard}}
-  </ItemGroup>
-  <ItemGroup>
-    <Compile Include="**\*.cs"
-             Exclude="obj\**" />
-  </ItemGroup>
-  {{^netStandard}}
-  <ItemGroup>
-      <PackageReference Include="RestSharp" Version="105.1.0" />
-      <PackageReference Include="Newtonsoft.Json" Version="13.0.1" />
+    <PackageReference Include="Microsoft.CSharp" Version="4.7.0" />
+    <PackageReference Include="RestSharp" Version="111.2.0" />
       <PackageReference Include="JsonSubTypes" Version="1.8.0" />
       <PackageReference Include="NuGet.Build.Tasks.Pack">
         <Version>5.9.1</Version>
         <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
         <PrivateAssets>all</PrivateAssets>
       </PackageReference>
+          <PackageReference Include="System.ComponentModel.Annotations" Version="5.0.0" />
+          <PackageReference Include="System.Data.DataSetExtensions" Version="4.5.0" />
+          <PackageReference Include="Newtonsoft.Json" Version="13.0.3" />
   </ItemGroup>
-  <Import Project="$(MsBuildToolsPath)\Microsoft.CSharp.targets" />
-  {{#generatePropertyChanged}}
-  <Import Project="..\..\packages\Fody.{{fody.version}}\build\portable-net+sl+win+wpa+wp\Fody.targets" Condition="Exists('..\..\packages\Fody.{{fody.version}}\build\portable-net+sl+win+wpa+wp\Fody.targets')" />
-  {{/generatePropertyChanged}}
-  {{/netStandard}}
-  {{#netStandard}}
-  <Import Project="$(MSBuildExtensionsPath32)\Microsoft\Portable\$(TargetFrameworkVersion)\Microsoft.Portable.CSharp.targets" />
-  <Import Project="$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props" Condition="Exists('$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props')" />
-  {{/netStandard}}
 </Project>
 
diff --git a/templates/csharp/README.mustache b/templates/csharp/README.mustache
index 76cfbe81..dbc61798 100644
--- a/templates/csharp/README.mustache
+++ b/templates/csharp/README.mustache
@@ -58,8 +58,7 @@ api.video's C# API client streamlines the coding process. Chunking files is hand
 {{^netStandard}}
 {{^supportsUWP}}
 
-- .NET 4.0 or later
-- Windows Phone 7.1 (Mango)
+- .NET 5.0 or later
 {{/supportsUWP}}
 {{#supportsUWP}}
 
@@ -71,9 +70,9 @@ api.video's C# API client streamlines the coding process. Chunking files is hand
 
 {{^netStandard}}
 
-- [RestSharp](https://www.nuget.org/packages/RestSharp) - 105.1.0
-- [Json.NET](https://www.nuget.org/packages/Newtonsoft.Json/) - 7.0.0 or later
-- [JsonSubTypes](https://www.nuget.org/packages/JsonSubTypes/) - 1.2.0 or later
+- [RestSharp](https://www.nuget.org/packages/RestSharp) - 111.2.0
+- [Json.NET](https://www.nuget.org/packages/Newtonsoft.Json/) - 13.0.3
+- [JsonSubTypes](https://www.nuget.org/packages/JsonSubTypes/) - 1.8.0
 
 We recommend using [NuGet](https://docs.nuget.org/consume/installing-nuget) to obtain the packages:
 
diff --git a/templates/csharp/Solution.mustache b/templates/csharp/Solution.mustache
index 3d97bd63..ebbf92fa 100644
--- a/templates/csharp/Solution.mustache
+++ b/templates/csharp/Solution.mustache
@@ -1,12 +1,15 @@
 Microsoft Visual Studio Solution File, Format Version 12.00
-# Visual Studio {{^netStandard}}2012{{/netStandard}}{{#netStandard}}14{{/netStandard}}
-VisualStudioVersion = {{^netStandard}}12.0.0.0{{/netStandard}}{{#netStandard}}14.0.25420.1{{/netStandard}}
-MinimumVisualStudioVersion = {{^netStandard}}10.0.0.1{{/netStandard}}{{#netStandard}}10.0.40219.1{{/netStandard}}
-Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "{{packageName}}", "src\{{packageName}}.csproj", "{{packageGuid}}"
+# Visual Studio Version 17
+VisualStudioVersion = 17.8.34511.84
+MinimumVisualStudioVersion = 10.0.40219.1
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "{{packageName}}", "src\{{packageName}}.csproj", "{{packageGuid}}"
 EndProject
-{{^excludeTests}}Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "{{testPackageName}}", "tests\ApiVideoTests.csproj", "{19F1DEBC-DE5E-4517-8062-F000CD499087}"
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "ApiVideoTests", "tests\ApiVideoTests.csproj", "{19F1DEBC-DE5E-4517-8062-F000CD499087}"
+	ProjectSection(ProjectDependencies) = postProject
+		{47CD76E4-3F74-3BC2-A1BA-AF194D07E1FA} = {47CD76E4-3F74-3BC2-A1BA-AF194D07E1FA}
+	EndProjectSection
 EndProject
-{{/excludeTests}}Global
+Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Any CPU = Debug|Any CPU
 		Release|Any CPU = Release|Any CPU
diff --git a/templates/csharp/api.mustache b/templates/csharp/api.mustache
index de755e2b..cebec12e 100644
--- a/templates/csharp/api.mustache
+++ b/templates/csharp/api.mustache
@@ -177,8 +177,8 @@ namespace {{packageName}}.{{apiPackage}}
                     }
                     
                     // make the HTTP request
-                    IRestResponse localVarResponse = (IRestResponse)this.ApiClient.CallApi(localVarPath,
-                        Method.POST, localVarQueryParams, localVarPostBody, localVarHeaderParams, localVarFormParams, localVarFileParams,
+                    RestResponse localVarResponse = (RestResponse)this.ApiClient.CallApi(localVarPath,
+                        Method.Post, localVarQueryParams, localVarPostBody, localVarHeaderParams, localVarFormParams, localVarFileParams,
                         localVarPathParams, localVarContentType);
 
                     int localVarStatusCode = (int)localVarResponse.StatusCode;
@@ -203,8 +203,8 @@ namespace {{packageName}}.{{apiPackage}}
 
 
             // make the HTTP request
-            IRestResponse localVarResponse = (IRestResponse) this.ApiClient.CallApi(localVarPath,
-                Method.{{httpMethod}}, localVarQueryParams, localVarPostBody, localVarHeaderParams, localVarFormParams, localVarFileParams,
+            RestResponse localVarResponse = (RestResponse) this.ApiClient.CallApi(localVarPath,
+                Method.{{#titlecase}}{{#lower}}{{httpMethod}}{{/lower}}{{/titlecase}}, localVarQueryParams, localVarPostBody, localVarHeaderParams, localVarFormParams, localVarFileParams,
                 localVarPathParams, localVarContentType);
 
             int localVarStatusCode = (int) localVarResponse.StatusCode;
@@ -327,8 +327,8 @@ namespace {{packageName}}.{{apiPackage}}
             }
 
             // make the HTTP request
-            IRestResponse localVarResponse = (IRestResponse) this.ApiClient.CallApi(localVarPath,
-                Method.{{httpMethod}}, localVarQueryParams, localVarPostBody, localVarHeaderParams, localVarFormParams, localVarFileParams,
+            RestResponse localVarResponse = (RestResponse) this.ApiClient.CallApi(localVarPath,
+                Method.{{#titlecase}}{{#lower}}{{httpMethod}}{{/lower}}{{/titlecase}}, localVarQueryParams, localVarPostBody, localVarHeaderParams, localVarFormParams, localVarFileParams,
                 localVarPathParams, localVarContentType);
 
             int localVarStatusCode = (int) localVarResponse.StatusCode;
diff --git a/templates/csharp/statics/.github/workflows/release.yml b/templates/csharp/statics/.github/workflows/release.yml
index 8ec0e852..37b3cd78 100644
--- a/templates/csharp/statics/.github/workflows/release.yml
+++ b/templates/csharp/statics/.github/workflows/release.yml
@@ -7,7 +7,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        dotnet: [ '3.1.x' ]
+        dotnet: [ '5.x' ]
     steps:
       - uses: actions/checkout@v2
       - name: Setup Dotnet ${{ matrix.dotnet }}
diff --git a/templates/csharp/statics/.github/workflows/test.yml b/templates/csharp/statics/.github/workflows/test.yml
index 2121e52c..3131d26c 100644
--- a/templates/csharp/statics/.github/workflows/test.yml
+++ b/templates/csharp/statics/.github/workflows/test.yml
@@ -5,7 +5,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        dotnet: [ '3.1.x' ]
+        dotnet: [ '5.x' ]
     steps:
       - uses: actions/checkout@v2
       - name: Setup Dotnet ${{ matrix.dotnet }}
diff --git a/templates/csharp/statics/tests/ApiVideoTests.csproj b/templates/csharp/statics/tests/ApiVideoTests.csproj
index 2f0bb5a3..9f85733d 100644
--- a/templates/csharp/statics/tests/ApiVideoTests.csproj
+++ b/templates/csharp/statics/tests/ApiVideoTests.csproj
@@ -1,28 +1,20 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFramework>netcoreapp3.1</TargetFramework>
+    <TargetFramework>net5.0</TargetFramework>
 
     <IsPackable>false</IsPackable>
   </PropertyGroup>
   
   <ItemGroup>
     <Reference Include="ApiVideo">
-      <HintPath>..\src\bin\Debug\ApiVideo.dll</HintPath>
-    </Reference>
-    <Reference Include="JsonSubTypes">
-      <HintPath>..\src\bin\Debug\JsonSubTypes.dll</HintPath>
-    </Reference>
-    <Reference Include="Newtonsoft.Json">
-      <HintPath>..\src\bin\Debug\Newtonsoft.Json.dll</HintPath>
-    </Reference>
-    <Reference Include="RestSharp">
-      <HintPath>..\src\bin\Debug\RestSharp.dll</HintPath>
+       <HintPath>..\src\bin\Debug\net5.0\ApiVideo.dll</HintPath>
     </Reference>
   </ItemGroup>
 
   <ItemGroup>
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="16.5.0" />
+    <PackageReference Include="RestSharp" Version="111.2.0" />
     <PackageReference Include="MSTest.TestAdapter" Version="2.1.0" />
     <PackageReference Include="MSTest.TestFramework" Version="2.1.0" />
     <PackageReference Include="coverlet.collector" Version="1.2.0" />
diff --git a/templates/csharp/statics/tests/Client/AbstractApiTest.cs b/templates/csharp/statics/tests/Client/AbstractApiTest.cs
index a506c488..5f5ffea7 100644
--- a/templates/csharp/statics/tests/Client/AbstractApiTest.cs
+++ b/templates/csharp/statics/tests/Client/AbstractApiTest.cs
@@ -3,13 +3,16 @@
 using System.Net;
 using System.IO;
 using ApiVideo.Client;
+using ApiVideo.Api;
+using System.Collections.Generic;
+using System.Threading;
 
 namespace VideoApiTests.Client
 {
     public abstract class AbstractApiTest
     {
-        private static RestClient restClient = Mock.Of<RestClient>();
-        protected static ApiVideoClient apiClientMock = new ApiVideoClient(restClient);
+        protected static Mock<IRestClient> restClient = new Mock<IRestClient>();
+        protected static ApiVideoClient apiClientMock = new ApiVideoClient(restClient.Object);
 
         protected string readResourceFile(string path)
         {
@@ -17,14 +20,21 @@ protected string readResourceFile(string path)
         }
         protected void answerOnAnyRequest(int statusCode, string body)
         {
-            var r = new RestResponse()
+            var responseHeaders = new List<HeaderParameter>
+            {
+                new HeaderParameter("Content-Type", "application/json")
+            };
+
+            var response1 = new RestResponse
             {
                 StatusCode = (HttpStatusCode)statusCode,
                 Content = body,
-                ResponseStatus = ResponseStatus.Completed
+                ResponseStatus = ResponseStatus.Completed,
+                Headers = responseHeaders
             };
-            Mock.Get(restClient).Setup(m => m.Execute(It.IsAny<IRestRequest>())).Returns(r);
+
+            restClient.Setup(m => m.ExecuteAsync(It.IsAny<RestRequest>(), It.IsAny<CancellationToken>()))
+                          .ReturnsAsync(response1);
         }
     }
-
-}
+}
\ No newline at end of file
diff --git a/templates/csharp/statics/tests/Client/VideosApiTest.cs b/templates/csharp/statics/tests/Client/VideosApiTest.cs
index bba178d3..cdcb64e2 100644
--- a/templates/csharp/statics/tests/Client/VideosApiTest.cs
+++ b/templates/csharp/statics/tests/Client/VideosApiTest.cs
@@ -6,6 +6,9 @@
 using System.Collections.Generic;
 using System.IO;
 using Moq;
+using RestSharp;
+using System.Net;
+using System.Threading;
 
 namespace VideoApiTests.Client
 {