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    copied!<p>I've managed to do what I wanted. Here is the main class with an extension method to add an ignored property to an existing map:</p> <pre class="lang-cs prettyprint-override"><code> static class TypeMapExtensions { public static TypeMap&lt;TSource, TDestination&gt; AddIgnoredMember&lt;TSource, TDestination&gt;( this TypeMap&lt;TSource, TDestination&gt; typeMap, Expression&lt;Func&lt;TDestination, object&gt;&gt; accessorExpression) { MemberInfo memberInfo = ReflectionHelper.FindProperty(accessorExpression); IMemberAccessor memberAccessor = memberInfo.ToMemberAccessor(); var propertyMap = new PropertyMap(memberAccessor); propertyMap.Ignore(); AddPropertyMap(typeMap.Map, propertyMap); return typeMap; } private static void AddPropertyMap(TypeMap typeMap, PropertyMap propertyMap) { typeMap.AddPropertyMap(propertyMap); if (typeMap.HasDerivedTypesToInclude()) { IEnumerable&lt;TypeMap&gt; derivedMaps = GetDerivedMaps(typeMap); foreach (var derivedMap in derivedMaps) derivedMap.AddInheritedPropertyMap(propertyMap); } } private static IEnumerable&lt;TypeMap&gt; GetDerivedMaps(TypeMap typeMap) { return Mapper.GetAllTypeMaps().Where( map =&gt; (map.Profile == typeMap.Profile) &amp;&amp; (typeMap.TypeHasBeenIncluded(map.SourceType, map.DestinationType))); } } </code></pre> <p>The class TypeMap is nothing more than a wrapper against the original TypeMap. The point of the generic version is to allow fluent syntax (see below).</p> <p>ReflectionHelper class borrowed from the AutoMapper source code. It depends on five other classes from the AutoMapper.Internal namespace, so they were borrowed as well.</p> <p>At the end, all this allows me to write the following code:</p> <pre class="lang-cs prettyprint-override"><code>TypeMap&lt;SourceType, DestinationType&gt;.Get() .AddIgnoredMember(dest =&gt; dest.IgnoredMember) .AddIgnoredMember(dest =&gt; dest.AnotherIgnoredMember); </code></pre>
 

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