another attempt to switch to 4.5

Author: fileformat

RegexPlanet-DotNet/RegexPlanet-DotNet.csproj

@@ -12,7 +12,7 @@
     <AppDesignerFolder>Properties</AppDesignerFolder>
     <RootNamespace>RegexPlanet_DotNet</RootNamespace>
     <AssemblyName>RegexPlanet-DotNet</AssemblyName>
-    <TargetFrameworkVersion>v4.0</TargetFrameworkVersion>
+    <TargetFrameworkVersion>v4.5</TargetFrameworkVersion>
     <UseIISExpress>false</UseIISExpress>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">