fetch xml to query expression, ms crm 2011

hi,

i have a query in fetchxml. can you please help me in converting this fetchxml to query expression ?

here is fetchxml

<fetch mapping="logical" count="50" version="1.0"><entity name="activitymimeattachment"><attribute name="filename" /><link-entity name="email" from="activityid" to="objectid" link-type="inner"><filter><condition attribute="regardingobjectid" operator="eq" value="23e43d5b-f65a-e211-82b1-f4ce46b50ead" /></filter></link-entity></entity></fetch>

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