解密web.config中的connectionString？

Question

I encrypt my connection string in the web.config with this code in my aspx load.

protected void Page_Load(object sender, EventArgs e)
{
    Configuration config =      WebConfigurationManager.OpenWebConfiguration("~");

    ConnectionStringsSection connSection = (ConnectionStringsSection)config.GetSection("connectionStrings");

    connSection.SectionInformation.ProtectSection("DataProtectionConfigurationProvider");

    config.Save();
}

I am newbie with c # and for now what I need is decrypt. Any idea how?

I could decrypt only one line using following code.

protected void Page_Load(object sender, EventArgs e)
{
    Configuration config = WebConfigurationManager.OpenWebConfiguration("~");

    ConnectionStringsSection connSection = (ConnectionStringsSection)config.GetSection("connectionStrings");

    //connSection.SectionInformation.ProtectSection("DataProtectionConfigurationProvider");
    connSection.SectionInformation.UnprotectSection();

    config.Save();   
}

Thanks.

Answer 1

I found how to do it here https://msdn.microsoft.com/en-us/library/dtkwfdky(v=vs.100).aspx

I could decrypt by only changing one line of the following code:

protected void Page_Load(object sender, EventArgs e)
{
    Configuration config = WebConfigurationManager.OpenWebConfiguration("~");

    ConnectionStringsSection connSection = (ConnectionStringsSection)config.GetSection("connectionStrings");
    //connSection.SectionInformation.ProtectSection("DataProtectionConfigurationProvider");
    connSection.SectionInformation.UnprotectSection();

    config.Save();   
}