diff --git a/src/primitives/istringwriter.rs b/src/primitives/istringwriter.rs
deleted file mode 100644
index 1a1d4a5..0000000
--- a/src/primitives/istringwriter.rs
+++ /dev/null
@@ -1,59 +0,0 @@
-use crate::primitives::{IUnknown, IUnknownVtbl, Interface, GUID, HRESULT};
-use std::{ffi::c_void, ops::Deref};
-use windows::core::BSTR;
-
-#[repr(C)]
-pub struct _StringWriter {
-    pub vtable: *const _StringWriterVtbl,
-}
-
-#[repr(C)]
-pub struct _StringWriterVtbl {
-    pub parent: IUnknownVtbl,
-    pub GetTypeInfoCount: *const c_void,
-    pub GetTypeInfo: *const c_void,
-    pub GetIDsOfNames: *const c_void,
-    pub Invoke: *const c_void,
-    pub ToString: unsafe extern "system" fn(this: *mut c_void, pRetVal: *mut *mut u16) -> HRESULT,
-}
-
-impl _StringWriter {
-    pub fn to_string(&self) -> Result<String, String> {
-        let mut buffer = BSTR::new();
-
-        let hr = unsafe { (*self).ToString(&mut buffer as *mut _ as *mut *mut u16) };
-
-        if hr.is_err() {
-            return Err(format!("Failed while running `ToString`: {:?}", hr));
-        }
-
-        Ok(buffer.to_string())
-    }
-
-    #[inline]
-    pub unsafe fn ToString(&self, pRetVal: *mut *mut u16) -> HRESULT {
-        ((*self.vtable).ToString)(self as *const _ as *mut _, pRetVal)
-    }
-}
-
-impl Interface for _StringWriter {
-    const IID: GUID = GUID::from_values(
-        0xcb9f94c0,
-        0xd691,
-        0x3b62,
-        [0xb0, 0xb2, 0x3c, 0xe5, 0x30, 0x9c, 0xfa, 0x62],
-    );
-
-    fn vtable(&self) -> *const c_void {
-        self.vtable as *const _ as *const c_void
-    }
-}
-
-impl Deref for _StringWriter {
-    type Target = IUnknown;
-
-    #[inline]
-    fn deref(&self) -> &IUnknown {
-        unsafe { &*(self as *const _StringWriter as *const IUnknown) }
-    }
-}
diff --git a/test/source/WithArgs/Program.cs b/test/source/WithArgs/Program.cs
index ec89b85..b7f8ab8 100644
--- a/test/source/WithArgs/Program.cs
+++ b/test/source/WithArgs/Program.cs
@@ -1,6 +1,8 @@
 using System;
 using System.IO;
 using System.Reflection;
+using System.Threading;
+using System.Threading.Tasks;
 
 namespace WithArgs
 {
@@ -17,6 +19,10 @@ namespace WithArgs
                 Console.WriteLine($"___ ({s.Length}) {s}");
             }
 
+            Console.Error.WriteLine("[!] If I had any errors, they would be here, in `stderr`!");
+
+            Console.WriteLine("[*] Bye!");
+
             Console.WriteLine();
         }
     }
diff --git a/test/source/WithArgs/WithArgs.csproj b/test/source/WithArgs/WithArgs.csproj
index 018fa47..bfbcefc 100644
--- a/test/source/WithArgs/WithArgs.csproj
+++ b/test/source/WithArgs/WithArgs.csproj
@@ -1,7 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <Project ToolsVersion="4.0" DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
-    <Import Project="$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props"
-            Condition="Exists('$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props')"/>
+    <Import Project="$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props" Condition="Exists('$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props')" />
     <PropertyGroup>
         <Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration>
         <Platform Condition=" '$(Platform)' == '' ">AnyCPU</Platform>
@@ -10,7 +9,7 @@
         <AppDesignerFolder>Properties</AppDesignerFolder>
         <RootNamespace>WithArgs</RootNamespace>
         <AssemblyName>WithArgs</AssemblyName>
-        <TargetFrameworkVersion>v4.0</TargetFrameworkVersion>
+        <TargetFrameworkVersion>v4.5</TargetFrameworkVersion>
         <FileAlignment>512</FileAlignment>
         <AutoGenerateBindingRedirects>true</AutoGenerateBindingRedirects>
     </PropertyGroup>
@@ -78,15 +77,15 @@
         <AssemblyName>with_args_x64</AssemblyName>
     </PropertyGroup>
     <ItemGroup>
-        <Reference Include="System"/>
-        <Reference Include="System.Core"/>
-        <Reference Include="System.Data"/>
-        <Reference Include="System.Xml"/>
+        <Reference Include="System" />
+        <Reference Include="System.Core" />
+        <Reference Include="System.Data" />
+        <Reference Include="System.Xml" />
     </ItemGroup>
     <ItemGroup>
-        <Compile Include="Program.cs"/>
-        <Compile Include="Properties\AssemblyInfo.cs"/>
+        <Compile Include="Program.cs" />
+        <Compile Include="Properties\AssemblyInfo.cs" />
     </ItemGroup>
-    <Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets"/>
+    <Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" />
 
 </Project>
diff --git a/test/source/WithExit/Program.cs b/test/source/WithExit/Program.cs
index 542e02e..f68275e 100644
--- a/test/source/WithExit/Program.cs
+++ b/test/source/WithExit/Program.cs
@@ -1,5 +1,6 @@
 using System;
 using System.Reflection;
+using System.Threading;
 
 namespace WithExit
 {
@@ -15,6 +16,10 @@ namespace WithExit
             Environment.Exit(-1);
             
             Console.WriteLine("[!] I am still alive!");
+            Console.Error.WriteLine("[!] If I had any errors, they would be here, in `stderr`!");
+
+            Console.WriteLine("[*] Bye!");
+
             Console.WriteLine();
         }
     }
diff --git a/test/source/WithoutArgs/Program.cs b/test/source/WithoutArgs/Program.cs
index 82af19e..992f90f 100644
--- a/test/source/WithoutArgs/Program.cs
+++ b/test/source/WithoutArgs/Program.cs
@@ -11,6 +11,8 @@ namespace WithoutArgs
             Console.WriteLine($"[*] Hello World from `{Assembly.GetExecutingAssembly().FullName}`!");
             Console.WriteLine($"[*] I am running in `{AppDomain.CurrentDomain}`!");
             Console.WriteLine("[*] I have no arguments and live a happy life!");
+            Console.Error.WriteLine("[!] But if I didn't live a happy life, all my error would be here, in `stderr`!");
+
             Console.WriteLine("[*] Bye!");
 
             Console.WriteLine();