In previous versions of Visual Studio, StyleCop was an msi installation of a VS extension and a global settings file was used to configure the application (StyleCop.settings). In VS2015, with Roslyn and Code Analysis, StyleCop comes as a NuGet package "StyleCop.Analyzers" and it requires two files to configure it (I recommend saving these two files to a common folder and adding the linked files from there in each project). Therefore, in each project: Example contents of the files: MyRuleset.ruleset
<?xml version="1.0" encoding="utf-8"?>
<RuleSet Name="My Ruleset" Description="My code analysis rules for StyleCop.Analyzer" ToolsVersion="14.0">
  <Rules AnalyzerId="StyleCop.Analyzers" RuleNamespace="StyleCop.Analyzers">
    <Rule Id="SA1600" Action="None" />
    <Rule Id="SA1601" Action="None" />
    <Rule Id="SA1602" Action="None" />
    <Rule Id="SA1633" Action="None" />
    <Rule Id="SA1634" Action="None" />
    <Rule Id="SA1635" Action="None" />
    <Rule Id="SA1636" Action="None" />
    <Rule Id="SA1637" Action="None" />
    <Rule Id="SA1638" Action="None" />
    <Rule Id="SA1640" Action="None" />
    <Rule Id="SA1641" Action="None" />
    <Rule Id="SA1652" Action="None" />
    <Rule Id="SA1118" Action="None" />
    <Rule Id="SA1516" Action="None" />
  "$schema": "",
  "settings": {
    "documentationRules": {
        "companyName": "PlaceholderCompany"
    "orderingRules": {
        "usingDirectivesPlacement": "outsideNamespace"