Upgrade solution and projects to Visual Studio 2017

Author: augustoproiete

src/Ookii.Dialogs.Wpf.Sample/Ookii.Dialogs.Wpf.Sample.csproj

@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
-<Project ToolsVersion="3.5" DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+<Project ToolsVersion="15.0" DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
   <PropertyGroup>
     <Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration>
     <Platform Condition=" '$(Platform)' == '' ">AnyCPU</Platform>

src/Ookii.Dialogs.Wpf.Sample/Properties/Resources.Designer.cs

@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
-<Project ToolsVersion="3.5" DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+<Project ToolsVersion="15.0" DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
   <PropertyGroup>
     <Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration>
     <Platform Condition=" '$(Platform)' == '' ">AnyCPU</Platform>

src/Ookii.Dialogs.Wpf.Sample/Properties/Settings.Designer.cs

@@ -1,6 +1,8 @@
 
-Microsoft Visual Studio Solution File, Format Version 10.00
-# Visual Studio 2008
+Microsoft Visual Studio Solution File, Format Version 12.00
+# Visual Studio 15
+VisualStudioVersion = 15.0.28010.2041
+MinimumVisualStudioVersion = 10.0.40219.1
 Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "Windows Presentation Foundation", "Windows Presentation Foundation", "{E248E2C9-CE4A-41D2-91A0-8F61AAB69247}"
 EndProject
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Ookii.Dialogs.Wpf.Sample", "Ookii.Dialogs.Wpf.Sample\Ookii.Dialogs.Wpf.Sample.csproj", "{E38181B2-E8E5-466D-9099-33FE75B4CFA1}"
@@ -29,4 +31,7 @@ Global
 		{E38181B2-E8E5-466D-9099-33FE75B4CFA1} = {E248E2C9-CE4A-41D2-91A0-8F61AAB69247}
 		{D01B1D20-8F5B-4834-8E5C-C7EC6DD587D4} = {E248E2C9-CE4A-41D2-91A0-8F61AAB69247}
 	EndGlobalSection
+	GlobalSection(ExtensibilityGlobals) = postSolution
+		SolutionGuid = {C17C6EF5-4A5E-45BB-AFB9-2D0547C4D682}
+	EndGlobalSection
 EndGlobal