Explicitly building using VS 2015 (14.0) and its msbuild (what implicitly enables code analysis during build) + Now consistent version of msbuild is used in all cases + Factoring out BUILD_PROPERTIES + BDS_BUILD_PROPERTIES + VS_BUILD_PROPERTIES + "invalid" and "missing" are considered as warnings

Source commit: f97acc33a1666df46f94cc00322ee6a01370655e

dotnet/WinSCPnet.csproj

@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
-<Project ToolsVersion="4.0" DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+<Project ToolsVersion="14.0" DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
   <PropertyGroup>
     <Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration>
     <Platform Condition=" '$(Platform)' == '' ">AnyCPU</Platform>

dotnet/WinSCPnet.ruleset

@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
-<RuleSet Name="WinSCP rules (subset of Microsoft All Rules)" ToolsVersion="10.0">
+<RuleSet Name="WinSCP rules (subset of Microsoft All Rules)" ToolsVersion="14.0">
   <IncludeAll Action="Warning" />
   <Rules AnalyzerId="Microsoft.Analyzers.ManagedCodeAnalysis" RuleNamespace="Microsoft.Rules.Managed">
     <Rule Id="CA1026" Action="None" />