I have two versions of the same assembly (Version=1.0.0.0 and Version=2.0.0.0) located in different sub folders of the bin directory. In app.config:

   <assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">
      <dependentAssembly>
        <assemblyIdentity
          name="AnotherLib"
          publicKeyToken="null"
          culture="neutral"/>
        <codeBase
	Version="1.0.0.0"
	href="file:///D:\tmp\Probing Test\Probing Test\bin\Debug\V1\AnotherLib.dll"/>
      </dependentAssembly>
    </assemblyBinding>

    <assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">
      <dependentAssembly>
        <assemblyIdentity
          name="AnotherLib"
          publicKeyToken="null"
          culture="neutral"/>
        <codeBase
	version="2.0.0.0"
	href="file:///D:\tmp\Probing Test\Probing Test\bin\Debug\V2\AnotherLib.dll"/>
      </dependentAssembly>
    </assemblyBinding>

Trying to get an instance of a class in the assembly I try getting the Type by:

Type t1 = Type.GetType("AnotherLib.Class1, AnotherLib, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null");
Type t2 = Type.GetType("AnotherLib.Class1, AnotherLib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=null");

but the Assembly for both types is version 1.0.0.0. Anyone know why this doesn't work. FWIW a similar pattern when dealing with strong named assemblies is locations outside the AppBase works fine.....

UPDATE: Also works if AnotherLib.dll is signed. Still don't know why that has to be tho.......