C#为配置文件加密的实现方法

    <appSettings configProtectionProvider="RsaProtectedConfigurationProvider">
        <EncryptedData Type="http://www.easck.com/2001/04/xmlenc#Element"
            xmlns="http://www.easck.com/2001/04/xmlenc#">
            <EncryptionMethod Algorithm="http://www.easck.com/2001/04/xmlenc#tripledes-cbc" />
            <KeyInfo xmlns="http://www.easck.com/2000/09/xmldsig#">
                <EncryptedKey xmlns="http://www.easck.com/2001/04/xmlenc#">
                    <EncryptionMethod Algorithm="http://www.easck.com/2001/04/xmlenc#rsa-1_5" />
                    <KeyInfo xmlns="http://www.easck.com/2000/09/xmldsig#">
                        <KeyName>Rsa Key</KeyName>
                    </KeyInfo>
                    <CipherData>
                        <CipherValue>WVoFIs8rSEgqKw1C0QCmePs7WK6EIoGCfdx9CTJNmABoVvoEWPnOEQwz/6Ruu0rGwa7q91KuhGILmy4NEN0padnX6FScCdEzP6CS59U3IFumYmTrD7D9ihqFO2aIL/SuBvV3D2kxhHaYGFaPuvYgsyOLf3+aYR3O/uh/k5wZxLoIeKUUrT762J3bdaK6cJWQeuOu4j2vDXEdawdwhlnK12UV8+/AXZNlFW1N3Z0RUVFX1nMSwTaIu8F3tZ9hCFbGwbTm2T0XnfDOcB6dCxCutqC8pXD36laAfiSANzAWoC+Yhf5eFSj24fX0NU6UTQB8fqLyOgWsIMLxZLKVrwnlmg==</CipherValue>
                    </CipherData>
                </EncryptedKey>
            </KeyInfo>
            <CipherData>
                <CipherValue>5W2KhG/oETLUDptobcOM52x1qD/g9A0By/wcGXI+fm7EdcD8mT3TxsLVBVcHRBCyUO7OIHl8NyCrduRSYwyd8ggBCriQ5KrbAmW4LXrNnw/JjjCEJWPuRcRucVRfpgap2nHh6BXRXC/AU6v0GcRqy7LV8179PgGtyAa8IE1mV/w=</CipherValue>
            </CipherData>