Add unit tests to proove that code needed to change !

MathMLToCSharp.sln

@@ -1,25 +1,32 @@
 
 Microsoft Visual Studio Solution File, Format Version 12.00
-# Visual Studio 15
-VisualStudioVersion = 15.0.26730.12
+# Visual Studio Version 16
+VisualStudioVersion = 16.0.29306.81
 MinimumVisualStudioVersion = 10.0.40219.1
 Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "Article", "Article", "{01843432-5BFE-490C-8C0F-196BB3461020}"
 	ProjectSection(SolutionItems) = preProject
-		.\Article\MmlSharp.htm = .\Article\MmlSharp.htm
+		.gitignore = .gitignore
+		LICENSE = LICENSE
+		Article\MmlSharp.htm = Article\MmlSharp.htm
+		README.md = README.md
 	EndProjectSection
 EndProject
-Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "MathMLToCSharp", ".\MathMLToCSharp\MathMLToCSharp.csproj", "{9C1737F0-6DCC-4CC5-8C8E-F9B4073683F8}"
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "MathMLToCSharpLib", "MathMLToCSharpLib\MathMLToCSharpLib.csproj", "{7E67AAFD-564C-4362-B93F-7FDB912E2DF7}"
 EndProject
-Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Tests", ".\Tests\Tests.csproj", "{320B2668-663F-49D1-9ADC-60D7674D1BAC}"
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "MathMLToCSharp", "MathMLToCSharp\MathMLToCSharp.csproj", "{9C1737F0-6DCC-4CC5-8C8E-F9B4073683F8}"
 EndProject
-Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "MathMLToCSharpLib", ".\MathMLToCSharpLib\MathMLToCSharpLib.csproj", "{3909E9A8-4E8A-4358-A8A9-3BA634090378}"
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Tests", "Tests\Tests.csproj", "{320B2668-663F-49D1-9ADC-60D7674D1BAC}"
 EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Any CPU = Debug|Any CPU
 		Release|Any CPU = Release|Any CPU
 	EndGlobalSection
 	GlobalSection(ProjectConfigurationPlatforms) = postSolution
+		{7E67AAFD-564C-4362-B93F-7FDB912E2DF7}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{7E67AAFD-564C-4362-B93F-7FDB912E2DF7}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{7E67AAFD-564C-4362-B93F-7FDB912E2DF7}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{7E67AAFD-564C-4362-B93F-7FDB912E2DF7}.Release|Any CPU.Build.0 = Release|Any CPU
 		{9C1737F0-6DCC-4CC5-8C8E-F9B4073683F8}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
 		{9C1737F0-6DCC-4CC5-8C8E-F9B4073683F8}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{9C1737F0-6DCC-4CC5-8C8E-F9B4073683F8}.Release|Any CPU.ActiveCfg = Release|Any CPU
@@ -28,10 +35,6 @@ Global
 		{320B2668-663F-49D1-9ADC-60D7674D1BAC}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{320B2668-663F-49D1-9ADC-60D7674D1BAC}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{320B2668-663F-49D1-9ADC-60D7674D1BAC}.Release|Any CPU.Build.0 = Release|Any CPU
-		{3909E9A8-4E8A-4358-A8A9-3BA634090378}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
-		{3909E9A8-4E8A-4358-A8A9-3BA634090378}.Debug|Any CPU.Build.0 = Debug|Any CPU
-		{3909E9A8-4E8A-4358-A8A9-3BA634090378}.Release|Any CPU.ActiveCfg = Release|Any CPU
-		{3909E9A8-4E8A-4358-A8A9-3BA634090378}.Release|Any CPU.Build.0 = Release|Any CPU
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE

MathMLToCSharp/App.xaml.cs

@@ -2,6 +2,7 @@
 using System.Windows;
 using System.Windows.Threading;
 using MathMLToCSharp.Properties;
+using MathMLToCSharpLib;
 
 namespace MathMLToCSharp
 {