public IMappingBuilder <TSource, TDest> ForMember <TProp>(Expression <Func <TDest, TProp> > destProp, Expression <Func <TSource, TProp> > sourceProp) { EnsureIsMemberExpression(destProp.Body); EnsureIsMemberExpression(sourceProp.Body); MappingExpression <TSource, TDest> .ReplaceMappingSource( (MemberExpression)destProp.Body, (MemberExpression)sourceProp.Body); return(this); }