Too many assemblies deployed to target device (.NET 2.0 CF)

Is use VS 2005 and want to deploy my .NET C# application to a device (Scanner Honeywell 7600)

On the device .NET 2 CF (SP1) is running with Windows CE 5.0.

If I create a default project in VS (Smart Device -> Windows CE 5.0 -> Device application) and just deploy the application, everything works fine.

Now if I add one assembly reference, e.g. log4net and want to deploy, a lot of additional assemblies are deployed to the device. Actually too many, the device runs out of disc space, see following VS consoloe output:

Deploying 'C:\Windows\assembly\GAC_MSIL\System\2.0.0.0__b77a5c561934e089\System.dll'
Deploying 'C:\Windows\assembly\GAC_32\System.Data.OracleClient\2.0.0.0__b77a5c561934e089\System.Data.OracleClient.dll'
Deploying 'C:\Windows\assembly\GAC_MSIL\System.Deployment\2.0.0.0__b03f5f7f11d50a3a\System.Deployment.dll'
Deploying 'C:\Windows\assembly\GAC_32\System.Web\2.0.0.0__b03f5f7f11d50a3a\System.Web.dll'
Deploying 'C:\Windows\assembly\GAC_MSIL\System.Drawing\2.0.0.0__b03f5f7f11d50a3a\System.Drawing.dll'
Deploying 'C:\Windows\assembly\GAC_MSIL\System.Configuration.Install\2.0.0.0__b03f5f7f11d50a3a\System.Configuration.Install.dll'
Deployment and/or registration failed with error: 0x8973190e. Error writing file '%csidl_program_files%\scanandtrackdotnet\system.data.dll'. Error 0x80070070: Es steht nicht genug Speicherplatz auf dem Datenträger zur Verfügung.
========== Build: 1 succeeded or up-to-date, 0 failed, 0 skipped ==========
========== Deploy: 0 succeeded, 1 failed, 0 skipped ==========

Question: Why are e.g. System.Drawing.dll and System.Data.OracleClient.dll deployed to the device, they are part of the .NET Framework? .NET 2 CF is already installed on the device, so why are these assemblies deployed again?

Why are these assemblies deployed?

Because log4net requires them.

How can I prevent it?

By using a smaller logging library, or simply using a StreamWriter to roll your own.