diff --git a/ConsoleDemo/ConsoleDemo.csproj b/ConsoleDemo/ConsoleDemo.csproj
index 8e56b75..1346ca7 100644
--- a/ConsoleDemo/ConsoleDemo.csproj
+++ b/ConsoleDemo/ConsoleDemo.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
     <OutputType>Exe</OutputType>
-    <TargetFramework>netcoreapp2.1</TargetFramework>
+    <TargetFramework>netcoreapp3.0</TargetFramework>
   </PropertyGroup>
   <ItemGroup>
     <ProjectReference Include="..\Parser\Parser.csproj" />
diff --git a/Parser.Tests/Parser.Tests.csproj b/Parser.Tests/Parser.Tests.csproj
index 0dcbb0e..9f96ade 100644
--- a/Parser.Tests/Parser.Tests.csproj
+++ b/Parser.Tests/Parser.Tests.csproj
@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFramework>netcoreapp2.1</TargetFramework>
+    <TargetFramework>netcoreapp3.0</TargetFramework>
     <IsPackable>false</IsPackable>
   </PropertyGroup>
   <ItemGroup>
diff --git a/Semantics/Context.cs b/Semantics/Context.cs
index f51a122..a1c1449 100644
--- a/Semantics/Context.cs
+++ b/Semantics/Context.cs
@@ -72,12 +72,12 @@ namespace Semantics
 
         private string GetPackageNameFromFolder(string folderName)
         {
-            return folderName.StartsWith('+') ? folderName.Substring(1, folderName.Length - 1) : null;
+            return folderName[0] == '+' ? folderName.Substring(1, folderName.Length - 1) : null;
         }
         
         private string GetClassNameFromFolder(string folderName)
         {
-            return folderName.StartsWith('@') ? folderName.Substring(1, folderName.Length - 1) : null;
+            return folderName[0] == '@' ? folderName.Substring(1, folderName.Length - 1) : null;
         }
 
         private void ScanPrivateDirectory(ClassContext currentContext, string directory)
diff --git a/Semantics/Semantics.csproj b/Semantics/Semantics.csproj
index 8d3ba26..11924a6 100644
--- a/Semantics/Semantics.csproj
+++ b/Semantics/Semantics.csproj
@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFramework>netcoreapp2.1</TargetFramework>
+    <TargetFramework>netstandard2.0</TargetFramework>
   </PropertyGroup>
   <ItemGroup>
     <ProjectReference Include="..\Parser\Parser.csproj" />
diff --git a/SyntaxGenerator/SyntaxGenerator.csproj b/SyntaxGenerator/SyntaxGenerator.csproj
index 4658176..5b8db53 100644
--- a/SyntaxGenerator/SyntaxGenerator.csproj
+++ b/SyntaxGenerator/SyntaxGenerator.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
     <OutputType>Exe</OutputType>
-    <TargetFramework>netcoreapp2.0</TargetFramework>
+    <TargetFramework>netcoreapp3.0</TargetFramework>
   </PropertyGroup>
   <ItemGroup>
     <None Update="input.xml">