Это работает
<unity xmlns="http://schemas.microsoft.com/practices/2010/unity">
<alias alias="MyStuffObject" type="MyStuffObject, MyStuff"/>
<!-- dictionary stuff -->
<alias alias="IDictionaryOfStuff" type="System.Collections.Generic.IDictionary`2[[System.String, mscorlib],[MyStuffObject, MyStuff]], mscorlib"/>
<alias alias="DictionaryOfStuff" type="System.Collections.Generic.Dictionary`2[[System.String, mscorlib],[MyStuffObject, MyStuff]], mscorlib"/>
<!-- Containers -->
<container name="Stuff">
<register type="IDictionaryOfStuff" mapTo="DictionaryOfStuff" name="dictionaryOfStuff">
<constructor />
<method name="Add">
<param name="key" type="System.String" value="Cool_Key"/>
<param name="value" type="IClinicalDocumentParser" dependencyName="coolStuffObject"/>
</method>
</register>
<register type="MyStuffObject" mapTo="MyStuffObject" name="coolStuffObject" />
</container>
</unity>