[csharp-netcore] Enable setting of RemoteCertificateValidationCallback through IReadableConfiguration (#15979)

* Fix for [BUG][C#][csharp] Use RestClient.RemoteCertificateValidationCallback for SSL validation #11497

* Fixed modification of wrong files through merging to master and applied the changes to the correct files

* Updated examples

* Forget some examples

* Updates branch to reflect master changes and published changed example files yet again to solve conflicts

* Fixed examples

modules/openapi-generator/src/main/resources/csharp/ApiClient.mustache

@@ -455,7 +455,8 @@ namespace {{packageName}}.Client
                 MaxTimeout = configuration.Timeout,
                 Proxy = configuration.Proxy,
                 UserAgent = configuration.UserAgent,
-                UseDefaultCredentials = configuration.UseDefaultCredentials        
+                UseDefaultCredentials = configuration.UseDefaultCredentials,
+                RemoteCertificateValidationCallback = configuration.RemoteCertificateValidationCallback
             };
 
             RestClient client = new RestClient(clientOptions)

modules/openapi-generator/src/main/resources/csharp/Configuration.mustache

@@ -12,6 +12,7 @@ using System.Reflection;
 using System.Security.Cryptography.X509Certificates;
 using System.Text;
 using System.Net.Http;
+using System.Net.Security;
 {{#useRestSharp}}
 {{#hasOAuthMethods}}using {{packageName}}.Client.Auth;
 {{/hasOAuthMethods}}
@@ -628,6 +629,11 @@ namespace {{packageName}}.Client
         }
         {{/hasHttpSignatureMethods}}
         
+        /// <summary>
+        /// Gets and Sets the RemoteCertificateValidationCallback
+        /// </summary>
+        public RemoteCertificateValidationCallback RemoteCertificateValidationCallback { get; set; }
+
         #endregion Properties
 
         #region Methods
@@ -714,7 +720,8 @@ namespace {{packageName}}.Client
                 TempFolderPath = second.TempFolderPath ?? first.TempFolderPath,
                 DateTimeFormat = second.DateTimeFormat ?? first.DateTimeFormat,
                 ClientCertificates = second.ClientCertificates ?? first.ClientCertificates,
-                UseDefaultCredentials = second.UseDefaultCredentials
+                UseDefaultCredentials = second.UseDefaultCredentials,
+                RemoteCertificateValidationCallback = second.RemoteCertificateValidationCallback ?? first.RemoteCertificateValidationCallback,
             };
             return config;
         }

modules/openapi-generator/src/main/resources/csharp/IReadableConfiguration.mustache

@@ -3,6 +3,7 @@
 using System;
 using System.Collections.Generic;
 using System.Net;
+using System.Net.Security;
 using System.Security.Cryptography.X509Certificates;
 {{#useRestSharp}}
 {{#hasOAuthMethods}}using {{packageName}}.Client.Auth;
@@ -161,5 +162,11 @@ namespace {{packageName}}.Client
         /// </summary>
         HttpSigningConfiguration HttpSigningConfiguration { get; }
         {{/hasHttpSignatureMethods}}
+
+        /// <summary>
+        /// Callback function for handling the validation of remote certificates. Useful for certificate pinning and
+        /// overriding certificate errors in the scope of a request.
+        /// </summary>
+        RemoteCertificateValidationCallback RemoteCertificateValidationCallback { get; }
     }
 }

samples/client/others/csharp-complex-files/src/Org.OpenAPITools/Client/ApiClient.cs

@@ -454,7 +454,8 @@ namespace Org.OpenAPITools.Client
                 MaxTimeout = configuration.Timeout,
                 Proxy = configuration.Proxy,
                 UserAgent = configuration.UserAgent,
-                UseDefaultCredentials = configuration.UseDefaultCredentials        
+                UseDefaultCredentials = configuration.UseDefaultCredentials,
+                RemoteCertificateValidationCallback = configuration.RemoteCertificateValidationCallback
             };
 
             RestClient client = new RestClient(clientOptions)

samples/client/others/csharp-complex-files/src/Org.OpenAPITools/Client/Configuration.cs

@@ -18,6 +18,7 @@ using System.Reflection;
 using System.Security.Cryptography.X509Certificates;
 using System.Text;
 using System.Net.Http;
+using System.Net.Security;
 
 namespace Org.OpenAPITools.Client
 {
@@ -516,6 +517,11 @@ namespace Org.OpenAPITools.Client
             return url;
         }
         
+        /// <summary>
+        /// Gets and Sets the RemoteCertificateValidationCallback
+        /// </summary>
+        public RemoteCertificateValidationCallback RemoteCertificateValidationCallback { get; set; }
+
         #endregion Properties
 
         #region Methods
@@ -591,7 +597,8 @@ namespace Org.OpenAPITools.Client
                 TempFolderPath = second.TempFolderPath ?? first.TempFolderPath,
                 DateTimeFormat = second.DateTimeFormat ?? first.DateTimeFormat,
                 ClientCertificates = second.ClientCertificates ?? first.ClientCertificates,
-                UseDefaultCredentials = second.UseDefaultCredentials
+                UseDefaultCredentials = second.UseDefaultCredentials,
+                RemoteCertificateValidationCallback = second.RemoteCertificateValidationCallback ?? first.RemoteCertificateValidationCallback,
             };
             return config;
         }

samples/client/others/csharp-complex-files/src/Org.OpenAPITools/Client/IReadableConfiguration.cs

@@ -11,6 +11,7 @@
 using System;
 using System.Collections.Generic;
 using System.Net;
+using System.Net.Security;
 using System.Security.Cryptography.X509Certificates;
 
 namespace Org.OpenAPITools.Client
@@ -130,5 +131,11 @@ namespace Org.OpenAPITools.Client
         /// </summary>
         /// <value>X509 Certificate collection.</value>
         X509CertificateCollection ClientCertificates { get; }
+
+        /// <summary>
+        /// Callback function for handling the validation of remote certificates. Useful for certificate pinning and
+        /// overriding certificate errors in the scope of a request.
+        /// </summary>
+        RemoteCertificateValidationCallback RemoteCertificateValidationCallback { get; }
     }
 }

samples/client/petstore/csharp/OpenAPIClient-ConditionalSerialization/src/Org.OpenAPITools/Client/ApiClient.cs

@@ -455,7 +455,8 @@ namespace Org.OpenAPITools.Client
                 MaxTimeout = configuration.Timeout,
                 Proxy = configuration.Proxy,
                 UserAgent = configuration.UserAgent,
-                UseDefaultCredentials = configuration.UseDefaultCredentials        
+                UseDefaultCredentials = configuration.UseDefaultCredentials,
+                RemoteCertificateValidationCallback = configuration.RemoteCertificateValidationCallback
             };
 
             RestClient client = new RestClient(clientOptions)

samples/client/petstore/csharp/OpenAPIClient-ConditionalSerialization/src/Org.OpenAPITools/Client/Configuration.cs

@@ -18,6 +18,7 @@ using System.Reflection;
 using System.Security.Cryptography.X509Certificates;
 using System.Text;
 using System.Net.Http;
+using System.Net.Security;
 using Org.OpenAPITools.Client.Auth;
 
 namespace Org.OpenAPITools.Client
@@ -650,6 +651,11 @@ namespace Org.OpenAPITools.Client
             set { _HttpSigningConfiguration = value; }
         }
         
+        /// <summary>
+        /// Gets and Sets the RemoteCertificateValidationCallback
+        /// </summary>
+        public RemoteCertificateValidationCallback RemoteCertificateValidationCallback { get; set; }
+
         #endregion Properties
 
         #region Methods
@@ -730,7 +736,8 @@ namespace Org.OpenAPITools.Client
                 TempFolderPath = second.TempFolderPath ?? first.TempFolderPath,
                 DateTimeFormat = second.DateTimeFormat ?? first.DateTimeFormat,
                 ClientCertificates = second.ClientCertificates ?? first.ClientCertificates,
-                UseDefaultCredentials = second.UseDefaultCredentials
+                UseDefaultCredentials = second.UseDefaultCredentials,
+                RemoteCertificateValidationCallback = second.RemoteCertificateValidationCallback ?? first.RemoteCertificateValidationCallback,
             };
             return config;
         }

samples/client/petstore/csharp/OpenAPIClient-ConditionalSerialization/src/Org.OpenAPITools/Client/IReadableConfiguration.cs

@@ -11,6 +11,7 @@
 using System;
 using System.Collections.Generic;
 using System.Net;
+using System.Net.Security;
 using System.Security.Cryptography.X509Certificates;
 using Org.OpenAPITools.Client.Auth;
 
@@ -160,5 +161,11 @@ namespace Org.OpenAPITools.Client
         /// Gets the HttpSigning configuration
         /// </summary>
         HttpSigningConfiguration HttpSigningConfiguration { get; }
+
+        /// <summary>
+        /// Callback function for handling the validation of remote certificates. Useful for certificate pinning and
+        /// overriding certificate errors in the scope of a request.
+        /// </summary>
+        RemoteCertificateValidationCallback RemoteCertificateValidationCallback { get; }
     }
 }

samples/client/petstore/csharp/OpenAPIClient-httpclient/src/Org.OpenAPITools/Client/Configuration.cs

@@ -18,6 +18,7 @@ using System.Reflection;
 using System.Security.Cryptography.X509Certificates;
 using System.Text;
 using System.Net.Http;
+using System.Net.Security;
 
 namespace Org.OpenAPITools.Client
 {
@@ -625,6 +626,11 @@ namespace Org.OpenAPITools.Client
             set { _HttpSigningConfiguration = value; }
         }
         
+        /// <summary>
+        /// Gets and Sets the RemoteCertificateValidationCallback
+        /// </summary>
+        public RemoteCertificateValidationCallback RemoteCertificateValidationCallback { get; set; }
+
         #endregion Properties
 
         #region Methods
@@ -701,7 +707,8 @@ namespace Org.OpenAPITools.Client
                 TempFolderPath = second.TempFolderPath ?? first.TempFolderPath,
                 DateTimeFormat = second.DateTimeFormat ?? first.DateTimeFormat,
                 ClientCertificates = second.ClientCertificates ?? first.ClientCertificates,
-                UseDefaultCredentials = second.UseDefaultCredentials
+                UseDefaultCredentials = second.UseDefaultCredentials,
+                RemoteCertificateValidationCallback = second.RemoteCertificateValidationCallback ?? first.RemoteCertificateValidationCallback,
             };
             return config;
         }

samples/client/petstore/csharp/OpenAPIClient-httpclient/src/Org.OpenAPITools/Client/IReadableConfiguration.cs

@@ -11,6 +11,7 @@
 using System;
 using System.Collections.Generic;
 using System.Net;
+using System.Net.Security;
 using System.Security.Cryptography.X509Certificates;
 
 namespace Org.OpenAPITools.Client
@@ -135,5 +136,11 @@ namespace Org.OpenAPITools.Client
         /// Gets the HttpSigning configuration
         /// </summary>
         HttpSigningConfiguration HttpSigningConfiguration { get; }
+
+        /// <summary>
+        /// Callback function for handling the validation of remote certificates. Useful for certificate pinning and
+        /// overriding certificate errors in the scope of a request.
+        /// </summary>
+        RemoteCertificateValidationCallback RemoteCertificateValidationCallback { get; }
     }
 }

samples/client/petstore/csharp/OpenAPIClient-net47/src/Org.OpenAPITools/Client/ApiClient.cs

@@ -456,7 +456,8 @@ namespace Org.OpenAPITools.Client
                 MaxTimeout = configuration.Timeout,
                 Proxy = configuration.Proxy,
                 UserAgent = configuration.UserAgent,
-                UseDefaultCredentials = configuration.UseDefaultCredentials        
+                UseDefaultCredentials = configuration.UseDefaultCredentials,
+                RemoteCertificateValidationCallback = configuration.RemoteCertificateValidationCallback
             };
 
             RestClient client = new RestClient(clientOptions)

samples/client/petstore/csharp/OpenAPIClient-net47/src/Org.OpenAPITools/Client/Configuration.cs

@@ -18,6 +18,7 @@ using System.Reflection;
 using System.Security.Cryptography.X509Certificates;
 using System.Text;
 using System.Net.Http;
+using System.Net.Security;
 using Org.OpenAPITools.Client.Auth;
 
 namespace Org.OpenAPITools.Client
@@ -655,6 +656,11 @@ namespace Org.OpenAPITools.Client
             set { _HttpSigningConfiguration = value; }
         }
         
+        /// <summary>
+        /// Gets and Sets the RemoteCertificateValidationCallback
+        /// </summary>
+        public RemoteCertificateValidationCallback RemoteCertificateValidationCallback { get; set; }
+
         #endregion Properties
 
         #region Methods
@@ -735,7 +741,8 @@ namespace Org.OpenAPITools.Client
                 TempFolderPath = second.TempFolderPath ?? first.TempFolderPath,
                 DateTimeFormat = second.DateTimeFormat ?? first.DateTimeFormat,
                 ClientCertificates = second.ClientCertificates ?? first.ClientCertificates,
-                UseDefaultCredentials = second.UseDefaultCredentials
+                UseDefaultCredentials = second.UseDefaultCredentials,
+                RemoteCertificateValidationCallback = second.RemoteCertificateValidationCallback ?? first.RemoteCertificateValidationCallback,
             };
             return config;
         }

samples/client/petstore/csharp/OpenAPIClient-net47/src/Org.OpenAPITools/Client/IReadableConfiguration.cs

@@ -11,6 +11,7 @@
 using System;
 using System.Collections.Generic;
 using System.Net;
+using System.Net.Security;
 using System.Security.Cryptography.X509Certificates;
 using Org.OpenAPITools.Client.Auth;
 
@@ -160,5 +161,11 @@ namespace Org.OpenAPITools.Client
         /// Gets the HttpSigning configuration
         /// </summary>
         HttpSigningConfiguration HttpSigningConfiguration { get; }
+
+        /// <summary>
+        /// Callback function for handling the validation of remote certificates. Useful for certificate pinning and
+        /// overriding certificate errors in the scope of a request.
+        /// </summary>
+        RemoteCertificateValidationCallback RemoteCertificateValidationCallback { get; }
     }
 }

samples/client/petstore/csharp/OpenAPIClient-net48/src/Org.OpenAPITools/Client/ApiClient.cs

@@ -456,7 +456,8 @@ namespace Org.OpenAPITools.Client
                 MaxTimeout = configuration.Timeout,
                 Proxy = configuration.Proxy,
                 UserAgent = configuration.UserAgent,
-                UseDefaultCredentials = configuration.UseDefaultCredentials        
+                UseDefaultCredentials = configuration.UseDefaultCredentials,
+                RemoteCertificateValidationCallback = configuration.RemoteCertificateValidationCallback
             };
 
             RestClient client = new RestClient(clientOptions)

samples/client/petstore/csharp/OpenAPIClient-net48/src/Org.OpenAPITools/Client/Configuration.cs

@@ -18,6 +18,7 @@ using System.Reflection;
 using System.Security.Cryptography.X509Certificates;
 using System.Text;
 using System.Net.Http;
+using System.Net.Security;
 using Org.OpenAPITools.Client.Auth;
 
 namespace Org.OpenAPITools.Client
@@ -655,6 +656,11 @@ namespace Org.OpenAPITools.Client
             set { _HttpSigningConfiguration = value; }
         }
         
+        /// <summary>
+        /// Gets and Sets the RemoteCertificateValidationCallback
+        /// </summary>
+        public RemoteCertificateValidationCallback RemoteCertificateValidationCallback { get; set; }
+
         #endregion Properties
 
         #region Methods
@@ -735,7 +741,8 @@ namespace Org.OpenAPITools.Client
                 TempFolderPath = second.TempFolderPath ?? first.TempFolderPath,
                 DateTimeFormat = second.DateTimeFormat ?? first.DateTimeFormat,
                 ClientCertificates = second.ClientCertificates ?? first.ClientCertificates,
-                UseDefaultCredentials = second.UseDefaultCredentials
+                UseDefaultCredentials = second.UseDefaultCredentials,
+                RemoteCertificateValidationCallback = second.RemoteCertificateValidationCallback ?? first.RemoteCertificateValidationCallback,
             };
             return config;
         }

samples/client/petstore/csharp/OpenAPIClient-net48/src/Org.OpenAPITools/Client/IReadableConfiguration.cs

@@ -11,6 +11,7 @@
 using System;
 using System.Collections.Generic;
 using System.Net;
+using System.Net.Security;
 using System.Security.Cryptography.X509Certificates;
 using Org.OpenAPITools.Client.Auth;
 
@@ -160,5 +161,11 @@ namespace Org.OpenAPITools.Client
         /// Gets the HttpSigning configuration
         /// </summary>
         HttpSigningConfiguration HttpSigningConfiguration { get; }
+
+        /// <summary>
+        /// Callback function for handling the validation of remote certificates. Useful for certificate pinning and
+        /// overriding certificate errors in the scope of a request.
+        /// </summary>
+        RemoteCertificateValidationCallback RemoteCertificateValidationCallback { get; }
     }
 }

samples/client/petstore/csharp/OpenAPIClient-net5.0/src/Org.OpenAPITools/Client/ApiClient.cs

@@ -456,7 +456,8 @@ namespace Org.OpenAPITools.Client
                 MaxTimeout = configuration.Timeout,
                 Proxy = configuration.Proxy,
                 UserAgent = configuration.UserAgent,
-                UseDefaultCredentials = configuration.UseDefaultCredentials        
+                UseDefaultCredentials = configuration.UseDefaultCredentials,
+                RemoteCertificateValidationCallback = configuration.RemoteCertificateValidationCallback
             };
 
             RestClient client = new RestClient(clientOptions)

samples/client/petstore/csharp/OpenAPIClient-net5.0/src/Org.OpenAPITools/Client/Configuration.cs

@@ -18,6 +18,7 @@ using System.Reflection;
 using System.Security.Cryptography.X509Certificates;
 using System.Text;
 using System.Net.Http;
+using System.Net.Security;
 using Org.OpenAPITools.Client.Auth;
 
 namespace Org.OpenAPITools.Client
@@ -655,6 +656,11 @@ namespace Org.OpenAPITools.Client
             set { _HttpSigningConfiguration = value; }
         }
         
+        /// <summary>
+        /// Gets and Sets the RemoteCertificateValidationCallback
+        /// </summary>
+        public RemoteCertificateValidationCallback RemoteCertificateValidationCallback { get; set; }
+
         #endregion Properties
 
         #region Methods
@@ -735,7 +741,8 @@ namespace Org.OpenAPITools.Client
                 TempFolderPath = second.TempFolderPath ?? first.TempFolderPath,
                 DateTimeFormat = second.DateTimeFormat ?? first.DateTimeFormat,
                 ClientCertificates = second.ClientCertificates ?? first.ClientCertificates,
-                UseDefaultCredentials = second.UseDefaultCredentials
+                UseDefaultCredentials = second.UseDefaultCredentials,
+                RemoteCertificateValidationCallback = second.RemoteCertificateValidationCallback ?? first.RemoteCertificateValidationCallback,
             };
             return config;
         }

samples/client/petstore/csharp/OpenAPIClient-net5.0/src/Org.OpenAPITools/Client/IReadableConfiguration.cs

@@ -11,6 +11,7 @@
 using System;
 using System.Collections.Generic;
 using System.Net;
+using System.Net.Security;
 using System.Security.Cryptography.X509Certificates;
 using Org.OpenAPITools.Client.Auth;
 
@@ -160,5 +161,11 @@ namespace Org.OpenAPITools.Client
         /// Gets the HttpSigning configuration
         /// </summary>
         HttpSigningConfiguration HttpSigningConfiguration { get; }
+
+        /// <summary>
+        /// Callback function for handling the validation of remote certificates. Useful for certificate pinning and
+        /// overriding certificate errors in the scope of a request.
+        /// </summary>
+        RemoteCertificateValidationCallback RemoteCertificateValidationCallback { get; }
     }
 }

samples/client/petstore/csharp/OpenAPIClient-unityWebRequest/src/Org.OpenAPITools/Client/Configuration.cs

@@ -18,6 +18,7 @@ using System.Reflection;
 using System.Security.Cryptography.X509Certificates;
 using System.Text;
 using System.Net.Http;
+using System.Net.Security;
 
 namespace Org.OpenAPITools.Client
 {
@@ -625,6 +626,11 @@ namespace Org.OpenAPITools.Client
             set { _HttpSigningConfiguration = value; }
         }
         
+        /// <summary>
+        /// Gets and Sets the RemoteCertificateValidationCallback
+        /// </summary>
+        public RemoteCertificateValidationCallback RemoteCertificateValidationCallback { get; set; }
+
         #endregion Properties
 
         #region Methods
@@ -701,7 +707,8 @@ namespace Org.OpenAPITools.Client
                 TempFolderPath = second.TempFolderPath ?? first.TempFolderPath,
                 DateTimeFormat = second.DateTimeFormat ?? first.DateTimeFormat,
                 ClientCertificates = second.ClientCertificates ?? first.ClientCertificates,
-                UseDefaultCredentials = second.UseDefaultCredentials
+                UseDefaultCredentials = second.UseDefaultCredentials,
+                RemoteCertificateValidationCallback = second.RemoteCertificateValidationCallback ?? first.RemoteCertificateValidationCallback,
             };
             return config;
         }

samples/client/petstore/csharp/OpenAPIClient-unityWebRequest/src/Org.OpenAPITools/Client/IReadableConfiguration.cs

@@ -11,6 +11,7 @@
 using System;
 using System.Collections.Generic;
 using System.Net;
+using System.Net.Security;
 using System.Security.Cryptography.X509Certificates;
 
 namespace Org.OpenAPITools.Client
@@ -135,5 +136,11 @@ namespace Org.OpenAPITools.Client
         /// Gets the HttpSigning configuration
         /// </summary>
         HttpSigningConfiguration HttpSigningConfiguration { get; }
+
+        /// <summary>
+        /// Callback function for handling the validation of remote certificates. Useful for certificate pinning and
+        /// overriding certificate errors in the scope of a request.
+        /// </summary>
+        RemoteCertificateValidationCallback RemoteCertificateValidationCallback { get; }
     }
 }

samples/client/petstore/csharp/OpenAPIClient/src/Org.OpenAPITools/Client/ApiClient.cs

@@ -455,7 +455,8 @@ namespace Org.OpenAPITools.Client
                 MaxTimeout = configuration.Timeout,
                 Proxy = configuration.Proxy,
                 UserAgent = configuration.UserAgent,
-                UseDefaultCredentials = configuration.UseDefaultCredentials        
+                UseDefaultCredentials = configuration.UseDefaultCredentials,
+                RemoteCertificateValidationCallback = configuration.RemoteCertificateValidationCallback
             };
 
             RestClient client = new RestClient(clientOptions)

samples/client/petstore/csharp/OpenAPIClient/src/Org.OpenAPITools/Client/Configuration.cs

@@ -18,6 +18,7 @@ using System.Reflection;
 using System.Security.Cryptography.X509Certificates;
 using System.Text;
 using System.Net.Http;
+using System.Net.Security;
 using Org.OpenAPITools.Client.Auth;
 
 namespace Org.OpenAPITools.Client
@@ -650,6 +651,11 @@ namespace Org.OpenAPITools.Client
             set { _HttpSigningConfiguration = value; }
         }
         
+        /// <summary>
+        /// Gets and Sets the RemoteCertificateValidationCallback
+        /// </summary>
+        public RemoteCertificateValidationCallback RemoteCertificateValidationCallback { get; set; }
+
         #endregion Properties
 
         #region Methods
@@ -730,7 +736,8 @@ namespace Org.OpenAPITools.Client
                 TempFolderPath = second.TempFolderPath ?? first.TempFolderPath,
                 DateTimeFormat = second.DateTimeFormat ?? first.DateTimeFormat,
                 ClientCertificates = second.ClientCertificates ?? first.ClientCertificates,
-                UseDefaultCredentials = second.UseDefaultCredentials
+                UseDefaultCredentials = second.UseDefaultCredentials,
+                RemoteCertificateValidationCallback = second.RemoteCertificateValidationCallback ?? first.RemoteCertificateValidationCallback,
             };
             return config;
         }

samples/client/petstore/csharp/OpenAPIClient/src/Org.OpenAPITools/Client/IReadableConfiguration.cs

@@ -11,6 +11,7 @@
 using System;
 using System.Collections.Generic;
 using System.Net;
+using System.Net.Security;
 using System.Security.Cryptography.X509Certificates;
 using Org.OpenAPITools.Client.Auth;
 
@@ -160,5 +161,11 @@ namespace Org.OpenAPITools.Client
         /// Gets the HttpSigning configuration
         /// </summary>
         HttpSigningConfiguration HttpSigningConfiguration { get; }
+
+        /// <summary>
+        /// Callback function for handling the validation of remote certificates. Useful for certificate pinning and
+        /// overriding certificate errors in the scope of a request.
+        /// </summary>
+        RemoteCertificateValidationCallback RemoteCertificateValidationCallback { get; }
     }
 }

samples/client/petstore/csharp/OpenAPIClientCore/src/Org.OpenAPITools/Client/ApiClient.cs

@@ -456,7 +456,8 @@ namespace Org.OpenAPITools.Client
                 MaxTimeout = configuration.Timeout,
                 Proxy = configuration.Proxy,
                 UserAgent = configuration.UserAgent,
-                UseDefaultCredentials = configuration.UseDefaultCredentials        
+                UseDefaultCredentials = configuration.UseDefaultCredentials,
+                RemoteCertificateValidationCallback = configuration.RemoteCertificateValidationCallback
             };
 
             RestClient client = new RestClient(clientOptions)

samples/client/petstore/csharp/OpenAPIClientCore/src/Org.OpenAPITools/Client/Configuration.cs

@@ -18,6 +18,7 @@ using System.Reflection;
 using System.Security.Cryptography.X509Certificates;
 using System.Text;
 using System.Net.Http;
+using System.Net.Security;
 using Org.OpenAPITools.Client.Auth;
 
 namespace Org.OpenAPITools.Client
@@ -655,6 +656,11 @@ namespace Org.OpenAPITools.Client
             set { _HttpSigningConfiguration = value; }
         }
         
+        /// <summary>
+        /// Gets and Sets the RemoteCertificateValidationCallback
+        /// </summary>
+        public RemoteCertificateValidationCallback RemoteCertificateValidationCallback { get; set; }
+
         #endregion Properties
 
         #region Methods
@@ -735,7 +741,8 @@ namespace Org.OpenAPITools.Client
                 TempFolderPath = second.TempFolderPath ?? first.TempFolderPath,
                 DateTimeFormat = second.DateTimeFormat ?? first.DateTimeFormat,
                 ClientCertificates = second.ClientCertificates ?? first.ClientCertificates,
-                UseDefaultCredentials = second.UseDefaultCredentials
+                UseDefaultCredentials = second.UseDefaultCredentials,
+                RemoteCertificateValidationCallback = second.RemoteCertificateValidationCallback ?? first.RemoteCertificateValidationCallback,
             };
             return config;
         }

samples/client/petstore/csharp/OpenAPIClientCore/src/Org.OpenAPITools/Client/IReadableConfiguration.cs

@@ -11,6 +11,7 @@
 using System;
 using System.Collections.Generic;
 using System.Net;
+using System.Net.Security;
 using System.Security.Cryptography.X509Certificates;
 using Org.OpenAPITools.Client.Auth;
 
@@ -160,5 +161,11 @@ namespace Org.OpenAPITools.Client
         /// Gets the HttpSigning configuration
         /// </summary>
         HttpSigningConfiguration HttpSigningConfiguration { get; }
+
+        /// <summary>
+        /// Callback function for handling the validation of remote certificates. Useful for certificate pinning and
+        /// overriding certificate errors in the scope of a request.
+        /// </summary>
+        RemoteCertificateValidationCallback RemoteCertificateValidationCallback { get; }
     }
 }

samples/client/petstore/csharp/OpenAPIClientCoreAndNet47/src/Org.OpenAPITools/Client/ApiClient.cs

@@ -455,7 +455,8 @@ namespace Org.OpenAPITools.Client
                 MaxTimeout = configuration.Timeout,
                 Proxy = configuration.Proxy,
                 UserAgent = configuration.UserAgent,
-                UseDefaultCredentials = configuration.UseDefaultCredentials        
+                UseDefaultCredentials = configuration.UseDefaultCredentials,
+                RemoteCertificateValidationCallback = configuration.RemoteCertificateValidationCallback
             };
 
             RestClient client = new RestClient(clientOptions)

samples/client/petstore/csharp/OpenAPIClientCoreAndNet47/src/Org.OpenAPITools/Client/Configuration.cs

@@ -18,6 +18,7 @@ using System.Reflection;
 using System.Security.Cryptography.X509Certificates;
 using System.Text;
 using System.Net.Http;
+using System.Net.Security;
 using Org.OpenAPITools.Client.Auth;
 
 namespace Org.OpenAPITools.Client
@@ -541,6 +542,11 @@ namespace Org.OpenAPITools.Client
             return url;
         }
         
+        /// <summary>
+        /// Gets and Sets the RemoteCertificateValidationCallback
+        /// </summary>
+        public RemoteCertificateValidationCallback RemoteCertificateValidationCallback { get; set; }
+
         #endregion Properties
 
         #region Methods
@@ -620,7 +626,8 @@ namespace Org.OpenAPITools.Client
                 TempFolderPath = second.TempFolderPath ?? first.TempFolderPath,
                 DateTimeFormat = second.DateTimeFormat ?? first.DateTimeFormat,
                 ClientCertificates = second.ClientCertificates ?? first.ClientCertificates,
-                UseDefaultCredentials = second.UseDefaultCredentials
+                UseDefaultCredentials = second.UseDefaultCredentials,
+                RemoteCertificateValidationCallback = second.RemoteCertificateValidationCallback ?? first.RemoteCertificateValidationCallback,
             };
             return config;
         }

samples/client/petstore/csharp/OpenAPIClientCoreAndNet47/src/Org.OpenAPITools/Client/IReadableConfiguration.cs

@@ -11,6 +11,7 @@
 using System;
 using System.Collections.Generic;
 using System.Net;
+using System.Net.Security;
 using System.Security.Cryptography.X509Certificates;
 using Org.OpenAPITools.Client.Auth;
 
@@ -155,5 +156,11 @@ namespace Org.OpenAPITools.Client
         /// </summary>
         /// <value>X509 Certificate collection.</value>
         X509CertificateCollection ClientCertificates { get; }
+
+        /// <summary>
+        /// Callback function for handling the validation of remote certificates. Useful for certificate pinning and
+        /// overriding certificate errors in the scope of a request.
+        /// </summary>
+        RemoteCertificateValidationCallback RemoteCertificateValidationCallback { get; }
     }
 }