Add project files.

DeviceAuthTools.sln

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+
+Microsoft Visual Studio Solution File, Format Version 12.00
+# Visual Studio Version 16
+VisualStudioVersion = 16.0.30225.117
+MinimumVisualStudioVersion = 10.0.40219.1
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "DeviceAuthTools", "DeviceAuthTools\DeviceAuthTools.csproj", "{33F69F16-9131-4131-B759-CF968F40C3AF}"
+EndProject
+Global
+	GlobalSection(SolutionConfigurationPlatforms) = preSolution
+		Debug|Any CPU = Debug|Any CPU
+		Release|Any CPU = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(ProjectConfigurationPlatforms) = postSolution
+		{33F69F16-9131-4131-B759-CF968F40C3AF}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{33F69F16-9131-4131-B759-CF968F40C3AF}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{33F69F16-9131-4131-B759-CF968F40C3AF}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{33F69F16-9131-4131-B759-CF968F40C3AF}.Release|Any CPU.Build.0 = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(SolutionProperties) = preSolution
+		HideSolutionNode = FALSE
+	EndGlobalSection
+	GlobalSection(ExtensibilityGlobals) = postSolution
+		SolutionGuid = {059AC312-558A-4A0A-8B74-EFAF37048F19}
+	EndGlobalSection
+EndGlobal

DeviceAuthTools/App.config

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+<?xml version="1.0" encoding="utf-8" ?>
+<configuration>
+    <startup> 
+        <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.7.2" />
+    </startup>
+</configuration>