System.OutOfMemoryException: Insufficient memory to continue the execution of the program. 
at System.Runtime.InteropServices.Marshal.AllocCoTaskMem(Int32 cb) 
at Rsa.KeyManagerClient.RkmBase.CreateKM_CS_IF_DATA(String string_data, Int32 int_data, Byte[] in_data, Int32 in_data_len, Byte[] in_data2, Int32 in_data2_len) 
at Rsa.KeyManagerClient.RkmBase.SetCSInterfaceData(SWIGTYPE_p_r_km_key_ctx_st key_ctx, SWIGTYPE_p_r_km_key_st key, String string_data, Int32 int_data, Byte[] in_data, Int32 in_data_len, Byte[] in_data2, Int32 in_data2_len) 
at Rsa.KeyManagerClient.RkmContext.EncryptByClass(String keyClass, Byte[] plainText, RkmCryptoFormatIdentifier format, RkmKey& key) 
at rkmcs_threaded.Program.singleEncrypt(RkmKey& key, Byte[] plainText) 
at System.Runtime.InteropServices.Marshal.AllocCoTaskMem(Int32 cb) 
at Rsa.KeyManagerClient.RkmBase.CreateKM_CS_IF_DATA(String string_data, Int32 int_data, Byte[] in_data, Int32 in_data_len, Byte[] in_data2, Int32 in_data2_len) 
at Rsa.KeyManagerClient.RkmBase.SetCSInterfaceData(SWIGTYPE_p_r_km_key_ctx_st key_ctx, SWIGTYPE_p_r_km_key_st key, String string_data, Int32 int_data, Byte[] in_data, Int32 in_data_len, Byte[] in_data2, Int32 in_data2_len) 
at Rsa.KeyManagerClient.RkmContext.EncryptByClass(String keyClass, Byte[] plainText, RkmCryptoFormatIdentifier format, RkmKey& key) 
at rkmcs_threaded.Program.singleEncrypt(RkmKey& key, Byte[] plainText)

public static void EncryptionAndDecryptionReusingKey()
        {
            byte[] cipherText1;
            byte[] decryptedData1;
            byte[] cipherText2;
            byte[] decryptedData2;
            RkmKey encryptionKey;
            RkmKey decryptionKey;

            // Encrypt the first plaintext using a key retrieved by Key Class. 
            cipherText1 = kmContext.EncryptByClass(SampleUtility.SampleKeyClass, plainText, RkmCryptoFormatIdentifier.Default,
                                               out encryptionKey);

            // Encrypt the second plaintext using the key from the first encryption.
            cipherText2 = encryptionKey.Encrypt(plainText2);

            // Decrypt the first ciphertext using the key retrieved by key ID. 
            decryptedData1 = kmContext.DecryptByCipherText(cipherText1, out decryptionKey);

            // Decrypt the second ciphertext using the key from the first decryption. 
            decryptedData2 = decryptionKey.Decrypt(cipherText2);

            // Output the results.
            DumpData("Result1", SampleUtility.StringToByteArray(plainText), cipherText1, decryptedData1);
            DumpData("Result2", SampleUtility.StringToByteArray(plainText2), cipherText2, decryptedData2);

            if (SampleUtility.ByteArrayToString(decryptedData1).CompareTo(plainText) != 0 ||
               SampleUtility.ByteArrayToString(decryptedData2).CompareTo(plainText2) != 0)
            {
                throw new Exception("Decryption failed");
            }
            else
            {
                Console.WriteLine("Decryption succeeded");
            }

            // Clean up the extracted keys
            encryptionKey.Dispose();
            decryptionKey.Dispose();
        }