diff --git a/modules/openapi-generator/src/main/resources/csharp-netcore/HttpSigningConfiguration.mustache b/modules/openapi-generator/src/main/resources/csharp-netcore/HttpSigningConfiguration.mustache
index f80e584c666..58a961b5da3 100644
--- a/modules/openapi-generator/src/main/resources/csharp-netcore/HttpSigningConfiguration.mustache
+++ b/modules/openapi-generator/src/main/resources/csharp-netcore/HttpSigningConfiguration.mustache
@@ -741,15 +741,6 @@ namespace {{packageName}}.Client
             {
                 keyType = PrivateKeyType.ECDSA;
             }
-            else if (key[0].Contains(ecPrivateKeyHeader) &&
-                key[key.Length - 1].ToString().Contains(ecPrivateKeyFooter))
-            {
-
-                // this type of key can hold many type different types of private key, but here due lack of pem header
-                // Considering this as EC key
-                //TODO :- update the key based on oid
-                keyType = PrivateKeyType.ECDSA;
-            }
             else
             {
                 throw new Exception("Either the key is invalid or key is not supported");
diff --git a/samples/client/petstore/csharp-netcore/OpenAPIClient-ConditionalSerialization/src/Org.OpenAPITools/Client/HttpSigningConfiguration.cs b/samples/client/petstore/csharp-netcore/OpenAPIClient-ConditionalSerialization/src/Org.OpenAPITools/Client/HttpSigningConfiguration.cs
index f3eaf3c5ade..6a8f9c8dc01 100644
--- a/samples/client/petstore/csharp-netcore/OpenAPIClient-ConditionalSerialization/src/Org.OpenAPITools/Client/HttpSigningConfiguration.cs
+++ b/samples/client/petstore/csharp-netcore/OpenAPIClient-ConditionalSerialization/src/Org.OpenAPITools/Client/HttpSigningConfiguration.cs
@@ -749,15 +749,6 @@ namespace Org.OpenAPITools.Client
             {
                 keyType = PrivateKeyType.ECDSA;
             }
-            else if (key[0].Contains(ecPrivateKeyHeader) &&
-                key[key.Length - 1].ToString().Contains(ecPrivateKeyFooter))
-            {
-
-                // this type of key can hold many type different types of private key, but here due lack of pem header
-                // Considering this as EC key
-                //TODO :- update the key based on oid
-                keyType = PrivateKeyType.ECDSA;
-            }
             else
             {
                 throw new Exception("Either the key is invalid or key is not supported");
diff --git a/samples/client/petstore/csharp-netcore/OpenAPIClient-httpclient/src/Org.OpenAPITools/Client/HttpSigningConfiguration.cs b/samples/client/petstore/csharp-netcore/OpenAPIClient-httpclient/src/Org.OpenAPITools/Client/HttpSigningConfiguration.cs
index f3eaf3c5ade..6a8f9c8dc01 100644
--- a/samples/client/petstore/csharp-netcore/OpenAPIClient-httpclient/src/Org.OpenAPITools/Client/HttpSigningConfiguration.cs
+++ b/samples/client/petstore/csharp-netcore/OpenAPIClient-httpclient/src/Org.OpenAPITools/Client/HttpSigningConfiguration.cs
@@ -749,15 +749,6 @@ namespace Org.OpenAPITools.Client
             {
                 keyType = PrivateKeyType.ECDSA;
             }
-            else if (key[0].Contains(ecPrivateKeyHeader) &&
-                key[key.Length - 1].ToString().Contains(ecPrivateKeyFooter))
-            {
-
-                // this type of key can hold many type different types of private key, but here due lack of pem header
-                // Considering this as EC key
-                //TODO :- update the key based on oid
-                keyType = PrivateKeyType.ECDSA;
-            }
             else
             {
                 throw new Exception("Either the key is invalid or key is not supported");
diff --git a/samples/client/petstore/csharp-netcore/OpenAPIClient-net47/src/Org.OpenAPITools/Client/HttpSigningConfiguration.cs b/samples/client/petstore/csharp-netcore/OpenAPIClient-net47/src/Org.OpenAPITools/Client/HttpSigningConfiguration.cs
index f3eaf3c5ade..6a8f9c8dc01 100644
--- a/samples/client/petstore/csharp-netcore/OpenAPIClient-net47/src/Org.OpenAPITools/Client/HttpSigningConfiguration.cs
+++ b/samples/client/petstore/csharp-netcore/OpenAPIClient-net47/src/Org.OpenAPITools/Client/HttpSigningConfiguration.cs
@@ -749,15 +749,6 @@ namespace Org.OpenAPITools.Client
             {
                 keyType = PrivateKeyType.ECDSA;
             }
-            else if (key[0].Contains(ecPrivateKeyHeader) &&
-                key[key.Length - 1].ToString().Contains(ecPrivateKeyFooter))
-            {
-
-                // this type of key can hold many type different types of private key, but here due lack of pem header
-                // Considering this as EC key
-                //TODO :- update the key based on oid
-                keyType = PrivateKeyType.ECDSA;
-            }
             else
             {
                 throw new Exception("Either the key is invalid or key is not supported");
diff --git a/samples/client/petstore/csharp-netcore/OpenAPIClient-net5.0/src/Org.OpenAPITools/Client/HttpSigningConfiguration.cs b/samples/client/petstore/csharp-netcore/OpenAPIClient-net5.0/src/Org.OpenAPITools/Client/HttpSigningConfiguration.cs
index f3eaf3c5ade..6a8f9c8dc01 100644
--- a/samples/client/petstore/csharp-netcore/OpenAPIClient-net5.0/src/Org.OpenAPITools/Client/HttpSigningConfiguration.cs
+++ b/samples/client/petstore/csharp-netcore/OpenAPIClient-net5.0/src/Org.OpenAPITools/Client/HttpSigningConfiguration.cs
@@ -749,15 +749,6 @@ namespace Org.OpenAPITools.Client
             {
                 keyType = PrivateKeyType.ECDSA;
             }
-            else if (key[0].Contains(ecPrivateKeyHeader) &&
-                key[key.Length - 1].ToString().Contains(ecPrivateKeyFooter))
-            {
-
-                // this type of key can hold many type different types of private key, but here due lack of pem header
-                // Considering this as EC key
-                //TODO :- update the key based on oid
-                keyType = PrivateKeyType.ECDSA;
-            }
             else
             {
                 throw new Exception("Either the key is invalid or key is not supported");
diff --git a/samples/client/petstore/csharp-netcore/OpenAPIClient/src/Org.OpenAPITools/Client/HttpSigningConfiguration.cs b/samples/client/petstore/csharp-netcore/OpenAPIClient/src/Org.OpenAPITools/Client/HttpSigningConfiguration.cs
index f3eaf3c5ade..6a8f9c8dc01 100644
--- a/samples/client/petstore/csharp-netcore/OpenAPIClient/src/Org.OpenAPITools/Client/HttpSigningConfiguration.cs
+++ b/samples/client/petstore/csharp-netcore/OpenAPIClient/src/Org.OpenAPITools/Client/HttpSigningConfiguration.cs
@@ -749,15 +749,6 @@ namespace Org.OpenAPITools.Client
             {
                 keyType = PrivateKeyType.ECDSA;
             }
-            else if (key[0].Contains(ecPrivateKeyHeader) &&
-                key[key.Length - 1].ToString().Contains(ecPrivateKeyFooter))
-            {
-
-                // this type of key can hold many type different types of private key, but here due lack of pem header
-                // Considering this as EC key
-                //TODO :- update the key based on oid
-                keyType = PrivateKeyType.ECDSA;
-            }
             else
             {
                 throw new Exception("Either the key is invalid or key is not supported");
diff --git a/samples/client/petstore/csharp-netcore/OpenAPIClientCore/src/Org.OpenAPITools/Client/HttpSigningConfiguration.cs b/samples/client/petstore/csharp-netcore/OpenAPIClientCore/src/Org.OpenAPITools/Client/HttpSigningConfiguration.cs
index f3eaf3c5ade..6a8f9c8dc01 100644
--- a/samples/client/petstore/csharp-netcore/OpenAPIClientCore/src/Org.OpenAPITools/Client/HttpSigningConfiguration.cs
+++ b/samples/client/petstore/csharp-netcore/OpenAPIClientCore/src/Org.OpenAPITools/Client/HttpSigningConfiguration.cs
@@ -749,15 +749,6 @@ namespace Org.OpenAPITools.Client
             {
                 keyType = PrivateKeyType.ECDSA;
             }
-            else if (key[0].Contains(ecPrivateKeyHeader) &&
-                key[key.Length - 1].ToString().Contains(ecPrivateKeyFooter))
-            {
-
-                // this type of key can hold many type different types of private key, but here due lack of pem header
-                // Considering this as EC key
-                //TODO :- update the key based on oid
-                keyType = PrivateKeyType.ECDSA;
-            }
             else
             {
                 throw new Exception("Either the key is invalid or key is not supported");