Merge pull request #710 from ButchersBoy/csharp70

test csharp 7

Author: ButchersBoy

MaterialDesignThemes.Wpf/Converters/MathMultipleConverter.cs

@@ -17,8 +17,7 @@ public object Convert(object[] value, Type targetType, object parameter, Culture
         {
             if (value == null || value.Length < 2 || value[0] == null || value[1] == null) return Binding.DoNothing;
 
-            double value1, value2;
-            if (!double.TryParse(value[0].ToString(), out value1) || !double.TryParse(value[1].ToString(), out value2))
+            if (!double.TryParse(value[0].ToString(), out double value1) || !double.TryParse(value[1].ToString(), out double value2))
                 return 0;
 
             switch (Operation)

README.md

@@ -33,13 +33,14 @@ Comprehensive and easy to use Material Design theme and control library for the
 
 # ![Alt text](web/images/MD4XAML28.png "In Action") See It Action
 
-* Download the source and run the demo (compiling source requires VS2015+).
+* Download the source and run the demo (compiling source requires VS2017+).
+* Download a pre-compiled demo from the [releases](https://github.com/ButchersBoy/MaterialDesignInXamlToolkit/releases) page.
 * Checkout [doobry](http://materialdesigninxaml.net/doobry).
 * Checkout [F1ix](http://materialdesigninxaml.net/f1ix).
 * Checkout [Motion List](https://github.com/MaterialDesignInXAML/MotionList).
 
 # ![Alt text](web/images/MD4XAML28.png "How Can I Use The Themes?") Source Code
-To load the source project you will need Visual Studio 2015.  Don't worry if you have an earlier version, you can still use the compiled assemblies from NuGet (``` Install-Package MaterialDesignThemes ```).  There are two demo projects in the solution, restore the NuGet packages and fire them both up.  One is a "pure" Material Design project, the other illustrates how to combine with Dragablz & MahApps.
+To load the source project you will need Visual Studio 2017.  Don't worry if you have an earlier version, you can still use the compiled assemblies from NuGet (``` Install-Package MaterialDesignThemes ```).  There are two demo projects in the solution, restore the NuGet packages and fire them both up.  One is a "pure" Material Design project, the other illustrates how to combine with Dragablz & MahApps.
 
 # ![Alt text](web/images/MD4XAML28.png "Contributions") Contribution Guidelines
 

appveyor.yml

@@ -4,7 +4,7 @@
     only:
       - master
 
-  os: Visual Studio 2015
+  os: Visual Studio 2017
   configuration: AppVeyor
   assembly_info:
     patch: true
@@ -14,8 +14,6 @@
     assembly_informational_version: '2.3.0.{build}'
   environment:
     RestorePackages: false
-  install:
-  - set PATH=C:\Program Files (x86)\MSBuild\14.0\Bin;%PATH%
   before_build:
   - ps: .paket\paket.exe install
   build:
@@ -39,7 +37,7 @@
     only:
       - release
 
-  os: Visual Studio 2015
+  os: Visual Studio 2017
   configuration: AppVeyor
   assembly_info:
     patch: true
@@ -49,8 +47,6 @@
     assembly_informational_version: '{version}'
   environment:
     RestorePackages: false    
-  install:
-  - set PATH=C:\Program Files (x86)\MSBuild\14.0\Bin;%PATH%
   before_build:
   - ps: .paket\paket.exe install
   build: