diff --git a/Exemples.sln b/Exemples.sln
index 875312a..d534a23 100644
--- a/Exemples.sln
+++ b/Exemples.sln
@@ -4429,8 +4429,6 @@ Global
 		{0D922BCD-7C0F-43FF-A015-F547716B8284}.Debug|ARM64.Build.0 = Debug|ARM64
 		{0D922BCD-7C0F-43FF-A015-F547716B8284}.Debug|ARM64.Deploy.0 = Debug|ARM64
 		{0D922BCD-7C0F-43FF-A015-F547716B8284}.Debug|x64.ActiveCfg = Debug|x64
-		{0D922BCD-7C0F-43FF-A015-F547716B8284}.Debug|x64.Build.0 = Debug|x64
-		{0D922BCD-7C0F-43FF-A015-F547716B8284}.Debug|x64.Deploy.0 = Debug|x64
 		{0D922BCD-7C0F-43FF-A015-F547716B8284}.Debug|x86.ActiveCfg = Debug|x86
 		{0D922BCD-7C0F-43FF-A015-F547716B8284}.Debug|x86.Build.0 = Debug|x86
 		{0D922BCD-7C0F-43FF-A015-F547716B8284}.Debug|x86.Deploy.0 = Debug|x86
@@ -4455,8 +4453,6 @@ Global
 		{BCE167F6-6323-46FC-A112-D9941A75815A}.Debug|ARM64.Build.0 = Debug|ARM64
 		{BCE167F6-6323-46FC-A112-D9941A75815A}.Debug|ARM64.Deploy.0 = Debug|ARM64
 		{BCE167F6-6323-46FC-A112-D9941A75815A}.Debug|x64.ActiveCfg = Debug|x64
-		{BCE167F6-6323-46FC-A112-D9941A75815A}.Debug|x64.Build.0 = Debug|x64
-		{BCE167F6-6323-46FC-A112-D9941A75815A}.Debug|x64.Deploy.0 = Debug|x64
 		{BCE167F6-6323-46FC-A112-D9941A75815A}.Debug|x86.ActiveCfg = Debug|x86
 		{BCE167F6-6323-46FC-A112-D9941A75815A}.Debug|x86.Build.0 = Debug|x86
 		{BCE167F6-6323-46FC-A112-D9941A75815A}.Debug|x86.Deploy.0 = Debug|x86
diff --git a/HtmlDecode/HtmlDecode.csproj b/HtmlDecode/HtmlDecode.csproj
index 88d67c3..98debef 100644
--- a/HtmlDecode/HtmlDecode.csproj
+++ b/HtmlDecode/HtmlDecode.csproj
@@ -6,7 +6,6 @@
     <OutputType>Exe</OutputType>
     <PackageId>HtmlDecode</PackageId>
     <RuntimeFrameworkVersion>2.2</RuntimeFrameworkVersion>
-    <PackageTargetFallback>$(PackageTargetFallback);dnxcore50</PackageTargetFallback>
     <GenerateAssemblyConfigurationAttribute>false</GenerateAssemblyConfigurationAttribute>
     <GenerateAssemblyCompanyAttribute>false</GenerateAssemblyCompanyAttribute>
     <GenerateAssemblyProductAttribute>false</GenerateAssemblyProductAttribute>
diff --git a/ex_050_010_Threading_en_UWP/ex_050_010_Threading_en_UWP.csproj b/ex_050_010_Threading_en_UWP/ex_050_010_Threading_en_UWP.csproj
index 6cae8a6..984d77a 100644
--- a/ex_050_010_Threading_en_UWP/ex_050_010_Threading_en_UWP.csproj
+++ b/ex_050_010_Threading_en_UWP/ex_050_010_Threading_en_UWP.csproj
@@ -98,6 +98,7 @@
     <UseVSHostingProcess>false</UseVSHostingProcess>
     <ErrorReport>prompt</ErrorReport>
     <Prefer32Bit>true</Prefer32Bit>
+    <UseDotNetNativeToolchain>false</UseDotNetNativeToolchain>
   </PropertyGroup>
   <PropertyGroup Condition="'$(Configuration)|$(Platform)' == 'Release|x64'">
     <OutputPath>bin\x64\Release\</OutputPath>
@@ -109,7 +110,7 @@
     <UseVSHostingProcess>false</UseVSHostingProcess>
     <ErrorReport>prompt</ErrorReport>
     <Prefer32Bit>true</Prefer32Bit>
-    <UseDotNetNativeToolchain>true</UseDotNetNativeToolchain>
+    <UseDotNetNativeToolchain>false</UseDotNetNativeToolchain>
   </PropertyGroup>
   <PropertyGroup>
     <RestoreProjectStyle>PackageReference</RestoreProjectStyle>