Change compilation targets.

* Remove net451 as a compilation target
* Upgrade to netcoreapp2.0

.gitignore

@@ -28,3 +28,4 @@ project.lock.json
 *.*sdf
 *.ipch
 .vs/
+global.json

build/dependencies.props

@@ -3,6 +3,7 @@
     <AspNetCoreVersion>1.2.0-*</AspNetCoreVersion>
     <CoreFxVersion>4.3.0</CoreFxVersion>
     <NetStandardImplicitPackageVersion>1.6.1</NetStandardImplicitPackageVersion>
+    <RuntimeFrameworkVersion>2.0.0-*</RuntimeFrameworkVersion>
     <TestSdkVersion>15.0.0</TestSdkVersion>
     <XunitVersion>2.2.0</XunitVersion>
   </PropertyGroup>

src/Microsoft.VisualStudio.Web.BrowserLink/Microsoft.VisualStudio.Web.BrowserLink.csproj

@@ -4,7 +4,7 @@
 
   <PropertyGroup>
     <Description>A middleware that supports creating a communication channel between the development environment and one or more web browsers.</Description>
-    <TargetFrameworks>net451;netstandard1.5</TargetFrameworks>
+    <TargetFrameworks>net46;netstandard1.5</TargetFrameworks>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
   </PropertyGroup>
 

test/Microsoft.VisualStudio.Web.BrowserLink.Test/Microsoft.VisualStudio.Web.BrowserLink.Test.csproj

@@ -3,8 +3,8 @@
   <Import Project="..\..\build\common.props" />
 
   <PropertyGroup>
-    <TargetFrameworks>net452;netcoreapp1.1</TargetFrameworks>
-    <TargetFrameworks Condition=" '$(OS)' != 'Windows_NT' ">netcoreapp1.1</TargetFrameworks>
+    <TargetFrameworks>net46;netcoreapp2.0</TargetFrameworks>
+    <TargetFrameworks Condition=" '$(OS)' != 'Windows_NT' ">netcoreapp2.0</TargetFrameworks>
   </PropertyGroup>
 
   <ItemGroup>