Overwrite machine.config oracle.manageddataaccess.client version setting at app.config C#

Question

Edit:

To be more clear, My question is how to overwrite machine.config setting from app.config for <oracle.manageddataaccess.client> without modify machine.config. I have to do that is because Visual studio EntityFramework Wizard/Server Explorer relay on machine level setting.

I have to config/register oracle.ManagedDataAccess on machine level in order to make Oracle.ManagedDataAccess.EntityFramework work with Visual studio 2015 (Is this true? Is there another way?).

Otherwise, I got following error on my .edmx file , and can't view model or connect to database , even from Server Explorer.

Error 175: The ADO.NET provider with invariant name 'Oracle.ManagedDataAccess.Client' is either not registered in the machine or application config file, or could not be loaded. See the inner exception for details.

The problem I have is that the oracle configure not only add the dll into GAC, It also add a following entry into my machine.config file.

<version number="4.121.2.0">
      <settings>
        <setting name="TNS_ADMIN" value="*my oracle home*\odp.net\managed\x86\..\..\..\network\admin" />
      </settings>
    </version>

Which is a problem when I indeed using version 4.121.2.0 and want to change that on application level.

What I want to do is to overwrite my machine.config setting in my app.config use following instead of mess around with my machine.config file

 <version number="*">
            <settings>
                <setting name="TNS_ADMIN" value="C:\OtherPalce\Oracle" />
            </settings>

Can not find any document that show me how to do that.

Is there a <clear> tag that supported under tag <oracle.manageddataaccess.client>

Or something else like add <remove version number="*"> on top.