How can I figure out what config files are being used?

We have 1 user where on their machine, in the machine.config file (both .NET 2.0 & 4.0) it has:

<system.data><DbProviderFactories><add name="Odbc Data Provider" invariant="System.Data.Odbc"
description=".Net Framework Data Provider for Odbc"
type="System.Data.Odbc.OdbcFactory, System.Data, Version=2.0.0.0,
Culture=neutral, PublicKeyToken=b77a5c561934e089"/><add name="OleDb Data Provider" invariant="System.Data.OleDb"
description=".Net Framework Data Provider for OleDb"
type="System.Data.OleDb.OleDbFactory, System.Data, Version=2.0.0.0,
Culture=neutral, PublicKeyToken=b77a5c561934e089"/><add name="OracleClient Data Provider"
invariant="System.Data.OracleClient" description=".Net Framework Data
Provider for Oracle" type="System.Data.OracleClient.OracleClientFactory,
System.Data.OracleClient, Version=2.0.0.0, Culture=neutral,
PublicKeyToken=b77a5c561934e089"/><add name="SqlClient Data Provider"
invariant="System.Data.SqlClient" description=".Net Framework Data
Provider for SqlServer" type="System.Data.SqlClient.SqlClientFactory,
System.Data, Version=2.0.0.0, Culture=neutral,
PublicKeyToken=b77a5c561934e089"/><add name="IBM DB2 for i .NET Provider"
invariant="IBM.Data.DB2.iSeries" description=".NET Framework Data Provider
for IBM i" type="IBM.Data.DB2.iSeries.iDB2Factory, IBM.Data.DB2.iSeries,
Version=12.0.0.0, Culture=neutral, PublicKeyToken=9cdb2ebfb1f93a26" /></DbProviderFactories></system.data>

And in winword.exe.config (we're a Word AddIn) and AutoTag2010.dll.config (the name of our AddIn) there is no <DbProviderFactories> section.

None of the above providers show up on a call to DbProviderFactories, not even the ODBC or OleDB connectors. How can I find out what other config files are in use when reading these?

thanks - dave

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