The initial commit

Outer.Inner/Outer.Inner.sln

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+
+Microsoft Visual Studio Solution File, Format Version 12.00
+# Visual Studio 2013
+VisualStudioVersion = 12.0.0.0
+MinimumVisualStudioVersion = 10.0.0.1
+Project("{8BB2217D-0F2D-49D1-97BC-3654ED321F3B}") = "Outer.Inner", "Outer.Inner/Outer.Inner.xproj", "{92674B09-30B1-4A8A-AE57-3E8CC139250B}"
+EndProject
+Global
+	GlobalSection(SolutionConfigurationPlatforms) = preSolution
+		Debug|Any CPU = Debug|Any CPU
+		Release|Any CPU = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(ProjectConfigurationPlatforms) = postSolution
+		{92674B09-30B1-4A8A-AE57-3E8CC139250B}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{92674B09-30B1-4A8A-AE57-3E8CC139250B}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{92674B09-30B1-4A8A-AE57-3E8CC139250B}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{92674B09-30B1-4A8A-AE57-3E8CC139250B}.Release|Any CPU.Build.0 = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(SolutionProperties) = preSolution
+		HideSolutionNode = FALSE
+	EndGlobalSection
+EndGlobal

Outer.Inner/Outer.Inner/Outer.Inner.xproj

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+<?xml version="1.0" encoding="utf-8"?>
+<Project ToolsVersion="14.0" DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <PropertyGroup>
+    <VisualStudioVersion Condition="'$(VisualStudioVersion)' == ''">14.0</VisualStudioVersion>
+    <VSToolsPath Condition="'$(VSToolsPath)' == ''">$(MSBuildExtensionsPath32)\Microsoft\VisualStudio\v$(VisualStudioVersion)</VSToolsPath>
+  </PropertyGroup>
+
+  <Import Project="$(VSToolsPath)\DotNet\Microsoft.DotNet.Props" Condition="'$(VSToolsPath)' != ''"  />
+  <PropertyGroup Label="Globals">
+    <ProjectGuid>92674B09-30B1-4A8A-AE57-3E8CC139250B</ProjectGuid>
+    <RootNamespace>Outer</RootNamespace>
+    <BaseIntermediateOutputPath Condition="'$(BaseIntermediateOutputPath)'=='' ">obj\$(MSBuildProjectName)</BaseIntermediateOutputPath>
+    <OutputPath Condition="'$(OutputPath)'=='' ">bin\$(MSBuildProjectName)\</OutputPath>
+    <TargetFrameworkVersion>v4.5.2</TargetFrameworkVersion>
+  </PropertyGroup>
+
+  <PropertyGroup>
+    <SchemaVersion>2.0</SchemaVersion>
+  </PropertyGroup>
+  <Import Project="$(VSToolsPath)\DotNet\Microsoft.DotNet.targets" Condition="'$(VSToolsPath)' != ''" />
+</Project>

Outer.Inner/Outer.Inner/Program.cs

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+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Threading.Tasks;
+
+namespace Outer.Inner
+{
+    public class Program
+    {
+        public static void Main(string[] args)
+        {
+        }
+    }
+}
+
+

Outer.Inner/Outer.Inner/Properties/AssemblyInfo.cs

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+using System.Reflection;
+using System.Runtime.CompilerServices;
+using System.Runtime.InteropServices;
+
+// General Information about an assembly is controlled through the following
+// set of attributes. Change these attribute values to modify the information
+// associated with an assembly.
+
+[assembly: AssemblyTitle("Outer.Inner")]
+[assembly: AssemblyDescription("")]
+[assembly: AssemblyConfiguration("")]
+[assembly: AssemblyCompany("")]
+[assembly: AssemblyProduct("$safeprojectname$")]
+[assembly: AssemblyCopyright("Copyright ©  116")]
+[assembly: AssemblyTrademark("")]
+[assembly: AssemblyCulture("")]
+
+// Setting ComVisible to false makes the types in this assembly not visible
+// to COM components.  If you need to access a type in this assembly from
+// COM, set the ComVisible attribute to true on that type.
+
+[assembly: ComVisible(false)]
+
+// The following GUID is for the ID of the typelib if this project is exposed to COM
+
+[assembly: Guid("92674B09-30B1-4A8A-AE57-3E8CC139250B")]
+

Outer.Inner/Outer.Inner/README.md

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+This project is to verify a bug in Rider https://youtrack.jetbrains.com/issue/RIDER-2240 .
+
+
+Steps:
+
+1. Create a dotnet core project
+1. Set the `RootNamespace` in `Outer.Inner.xproj` to `Outer` (By manually editing the `xproj` file).
+1. Create a directory `SubDir` in the project.
+1. Add a class `Sample.cs` in directory `SubDir`.
+
+Expected:
+
+Rider should give NO warning for the namespace `Outer.SubDir` in `Sample.cs`.
+
+Actual:
+Rider warns `Namespace does not correspond to file location, should be 'Outer.Inner.Inner'`

Outer.Inner/Outer.Inner/SubDir/Sample.cs

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+namespace Outer.SubDir
+{
+    public class Sample
+    {
+
+    }
+}

Outer.Inner/Outer.Inner/project.json

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+{
+  "version": "1.0.0-*",
+  "buildOptions": {
+    "emitEntryPoint": true
+  },
+
+  "dependencies": {
+    "Microsoft.NETCore.App": {
+      "type": "platform",
+      "version": "1.0.0"
+    }
+  },
+
+  "frameworks": {
+    "netcoreapp1.0": {
+      "imports": "dnxcore50"
+    }
+  }
+}