Migrated project to Visual Studio 2015 and fixed 3 compilation errors

Author: NikolayIT

Source/Source/Parser.cs

@@ -82,7 +82,7 @@ public bool Accept(RTFToken token)
             if ( token.Key == "emdash")
             {
                 CheckBuffer();
-                myStr.Append('¡ª');
+                myStr.Append("¡ª"); // TODO: Check this literal
                 return true;
             }
             if ( token.Key == "")

Source/Source/RTFNodeGroup.cs

@@ -162,13 +162,13 @@ internal void MergeText()
 					if( node.Keyword == "emdash")
 					{
 						AddString( myStr , buffer );
-						myStr.Append( '¡ª');
+						myStr.Append( "¡ª"); // TODO: Check this literal
 						continue ;
 					}
 					if( node.Keyword == "" )
 					{
 						AddString( myStr , buffer );
-						myStr.Append( '¨C' );
+						myStr.Append( "¨C" ); // TODO: Check this literal
 						continue ;
 					}
 				}

Source/Source/XDesigner.RTF.csproj

@@ -1,4 +1,5 @@
-<Project DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+<?xml version="1.0" encoding="utf-8"?>
+<Project DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003" ToolsVersion="14.0">
   <PropertyGroup>
     <Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration>
     <Platform Condition=" '$(Platform)' == '' ">AnyCPU</Platform>
@@ -21,6 +22,12 @@
     <AssemblyOriginatorKeyFile>yyf.snk</AssemblyOriginatorKeyFile>
     <StartupObject>
     </StartupObject>
+    <TargetFrameworkVersion>v2.0</TargetFrameworkVersion>
+    <FileUpgradeFlags>
+    </FileUpgradeFlags>
+    <UpgradeBackupLocation>
+    </UpgradeBackupLocation>
+    <OldToolsVersion>2.0</OldToolsVersion>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
     <DebugSymbols>true</DebugSymbols>

Source/Test/XDesigner.RTF.Test.csproj

@@ -1,4 +1,5 @@
-<Project DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+<?xml version="1.0" encoding="utf-8"?>
+<Project DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003" ToolsVersion="14.0">
   <PropertyGroup>
     <Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration>
     <Platform Condition=" '$(Platform)' == '' ">AnyCPU</Platform>
@@ -17,6 +18,12 @@
     </SccAuxPath>
     <SccProvider>
     </SccProvider>
+    <TargetFrameworkVersion>v2.0</TargetFrameworkVersion>
+    <FileUpgradeFlags>
+    </FileUpgradeFlags>
+    <UpgradeBackupLocation>
+    </UpgradeBackupLocation>
+    <OldToolsVersion>2.0</OldToolsVersion>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
     <DebugSymbols>true</DebugSymbols>

Source/XDesigner.RTF.sln

@@ -1,15 +1,17 @@
 
-Microsoft Visual Studio Solution File, Format Version 9.00
-# Visual Studio 2005
-Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "XDesigner.RTF", "Source\XDesigner.RTF.csproj", "{D35F9B37-CF93-48AE-9A1A-3A99930F04FB}"
-EndProject
-Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "XDesigner.RTF.Test", "Test\XDesigner.RTF.Test.csproj", "{E91ECAF1-8270-4BD2-8517-5F28DF5B8058}"
-EndProject
+Microsoft Visual Studio Solution File, Format Version 12.00
+# Visual Studio 14
+VisualStudioVersion = 14.0.23107.0
+MinimumVisualStudioVersion = 10.0.40219.1
 Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "Solution Items", "Solution Items", "{216DF09C-9B07-4186-A4E0-62D592A8783A}"
 	ProjectSection(SolutionItems) = preProject
 		readme.rtf = readme.rtf
 	EndProjectSection
 EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "XDesigner.RTF", "Source\XDesigner.RTF.csproj", "{D35F9B37-CF93-48AE-9A1A-3A99930F04FB}"
+EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "XDesigner.RTF.Test", "Test\XDesigner.RTF.Test.csproj", "{E91ECAF1-8270-4BD2-8517-5F28DF5B8058}"
+EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Any CPU = Debug|Any CPU