More details to come as to how this works. However you can paste this code into Resharper's Options -> Languages -> C# : Type Members Layout. Simply uncheck the box "Use Default Patterns" and overwrite the custom pattern with the pattern below.
<?xml version="1.0" encoding="utf-8" ?>
<!--
I. Overall
I.1 Each pattern can have <Match>....</Match> element. For the given type declaration, the pattern with the match, evaluated to 'true' with the largest weight, will be used
I.2 Each pattern consists of the sequence of <Entry>...</Entry> elements. Type member declarations are distributed between entries
I.3 If pattern has RemoveAllRegions="true" attribute, then all regions will be cleared prior to reordering. Otherwise, only auto-generated regions will be cleared
I.4 The contents of each entry is sorted by given keys (First key is primary, next key is secondary, etc). Then the declarations are grouped and en-regioned by given property
II. Available match operands
Each operand may have Weight="..." attribute. This weight will be added to the match weight if the operand is evaluated to 'true'.
The default weight is 1
II.1 Boolean functions:
II.1.1 <And>....</And>
II.1.2 <Or>....</Or>
II.1.3 <Not>....</Not>
II.2 Operands
II.2.1 <Kind Is="..."/>. Kinds are: class, struct, interface, enum, delegate, type, constructor, destructor, property, indexer, method, operator, field, constant, event, member
II.2.2 <Name Is="..." [IgnoreCase="true/false"] />. The 'Is' attribute contains regular expression
II.2.3 <HasAttribute CLRName="..." [Inherit="true/false"] />. The 'CLRName' attribute contains regular expression
II.2.4 <Access Is="..."/>. The 'Is' values are: public, protected, internal, protected internal, private
II.2.5 <Static/>
II.2.6 <Abstract/>
II.2.7 <Virtual/>
II.2.8 <Override/>
II.2.9 <Sealed/>
II.2.10 <Readonly/>
II.2.11 <ImplementsInterface CLRName="..."/>. The 'CLRName' attribute contains regular expression
II.2.12 <HandlesEvent />
-->
<Patterns xmlns="urn:shemas-jetbrains-com:member-reordering-patterns">
<!--Do not reorder COM interfaces and structs marked by StructLayout attribute-->
<Pattern>
<Match>
<Or Weight="100">
<And>
<Kind Is="interface"/>
<Or>
<HasAttribute CLRName="System.Runtime.InteropServices.InterfaceTypeAttribute"/>
<HasAttribute CLRName="System.Runtime.InteropServices.ComImport"/>
</Or>
</And>
<HasAttribute CLRName="System.Runtime.InteropServices.StructLayoutAttribute"/>
</Or>
</Match>
</Pattern>
<!--Special formatting of NUnit test fixture-->
<Pattern RemoveAllRegions="true">
<Match>
<And Weight="100">
<Kind Is="class"/>
<HasAttribute CLRName="NUnit.Framework.TestFixtureAttribute" Inherit="true"/>
</And>
</Match>
<!--Setup/Teardow-->
<Entry>
<Match>
<And>
<Kind Is="method"/>
<Or>
<HasAttribute CLRName="NUnit.Framework.SetUpAttribute" Inherit="true"/>
<HasAttribute CLRName="NUnit.Framework.TearDownAttribute" Inherit="true"/>
<HasAttribute CLRName="NUnit.Framework.FixtureSetUpAttribute" Inherit="true"/>
<HasAttribute CLRName="NUnit.Framework.FixtureTearDownAttribute" Inherit="true"/>
</Or>
</And>
</Match>
<Group Region="Setup/Teardown"/>
</Entry>
<!--All other members-->
<Entry/>
<!--Test methods-->
<Entry>
<Match>
<And Weight="100">
<Kind Is="method"/>
<HasAttribute CLRName="NUnit.Framework.TestAttribute" Inherit="false"/>
</And>
</Match>
<Sort>
<Name/>
</Sort>
</Entry>
</Pattern>
<!--Default pattern-->
<Pattern>
<!--static fields and constants-->
<Entry>
<Match>
<Or>
<Kind Is="constant"/>
<And>
<Kind Is="field"/>
<Static/>
</And>
</Or>
</Match>
<Sort>
<Kind Order="constant field"/>
</Sort>
<Group Region="Constants"/>
</Entry>
<!--instance fields-->
<Entry>
<Match>
<And>
<Kind Is="field"/>
<Not>
<Static/>
</Not>
</And>
</Match>
<Sort>
<Readonly/>
</Sort>
<Group Region="Fields"/>
</Entry>
<!--Constructors. Place static one first-->
<Entry>
<Match>
<Or>
<Kind Is="constructor"/>
<Kind Is="destructor"/>
</Or>
</Match>
<Sort>
<Static/>
</Sort>
<Group Region="Constructors"/>
</Entry>
<!--properties, indexers-->
<Entry>
<Match>
<Or>
<Kind Is="property"/>
<Kind Is="indexer"/>
</Or>
</Match>
<Group Region="Properties"/>
</Entry>
<!--all other members-->
<Entry/>
<!--public delegate-->
<Entry>
<Match>
<And Weight="100">
<Access Is="public"/>
<Kind Is="delegate"/>
</And>
</Match>
<Sort>
<Name/>
</Sort>
<Group Region="Delegates"/>
</Entry>
<!--public enum-->
<Entry>
<Match>
<And Weight="100">
<Access Is="public"/>
<Kind Is="enum"/>
</And>
</Match>
<Sort>
<Name/>
</Sort>
<Group Region="Enumerations"/>
</Entry>
<!--nested types-->
<Entry>
<Match>
<Kind Is="type"/>
</Match>
<Sort>
<Name/>
</Sort>
<Group>
<Name Region="Nested type: ${Name}"/>
</Group>
</Entry>
</Pattern>
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