make some projects compatible with netframework4.8 again

Pilz.Collections/Pilz.Collections.csproj

@@ -3,7 +3,7 @@
   <PropertyGroup>
     
     <StartupObject />
-    <TargetFrameworks>net8.0</TargetFrameworks>
+    <TargetFrameworks>net8.0;netstandard2.0</TargetFrameworks>
     <LangVersion>latest</LangVersion>
     <ImplicitUsings>enable</ImplicitUsings>
     <Nullable>enable</Nullable>

Pilz.Cryptography/Helpers.cs

@@ -41,7 +41,7 @@ public static class Helpers
         var dateTime = DateTime.UtcNow.ToString("yyyyMMddHHmmssfffffff");
         var type = typeof(T).ToString();
         var together = sn + dateTime + type + var;
-        var hash = BitConverter.ToString(MD5.HashData(Encoding.Default.GetBytes(together))).Replace("-", string.Empty);
+        var hash = BitConverter.ToString(new HMACMD5().ComputeHash(Encoding.Default.GetBytes(together))).Replace("-", string.Empty);
         return hash;
     }
 }

Pilz.Cryptography/Pilz.Cryptography.csproj

@@ -1,7 +1,8 @@
 <Project Sdk="Microsoft.NET.Sdk">
   
   <PropertyGroup>
-    <TargetFrameworks>net8.0</TargetFrameworks>
+    <TargetFrameworks>net8.0;netstandard2.0</TargetFrameworks>
+    <LangVersion>latest</LangVersion>
   </PropertyGroup>
   
   <PropertyGroup>

Pilz.Drawing/Pilz.Drawing.vbproj

@@ -1,7 +1,8 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
     <MyType>Windows</MyType>
-    <TargetFrameworks>net8.0-windows</TargetFrameworks>
+    <TargetFrameworks>net8.0-windows;netframework4.8</TargetFrameworks>
+    <LangVersion>latest</LangVersion>
     <NoWarn>42016,41999,42017,42018,42019,42032,42036,42020,42021,42022</NoWarn>
     <DocumentationFile>Pilz.Drawing.xml</DocumentationFile>
     <DefineTrace>true</DefineTrace>
@@ -26,7 +27,7 @@
     <OptionInfer>On</OptionInfer>
   </PropertyGroup>
   <PropertyGroup>
-    <Version>2.0.1</Version>
+    <Version>2.0.2</Version>
   </PropertyGroup>
   <ItemGroup>
     <Import Include="Microsoft.VisualBasic" />

Pilz.Extensions/Pilz.Extensions.csproj

@@ -1,7 +1,8 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFramework>net8.0</TargetFramework>
+    <TargetFrameworks>net8.0;netstandard2.0</TargetFrameworks>
+    <LangVersion>latest</LangVersion>
     <ImplicitUsings>enable</ImplicitUsings>
     <Nullable>enable</Nullable>
   </PropertyGroup>

Pilz.Gaming.Minecraft/Pilz.Gaming.Minecraft.csproj

@@ -2,6 +2,7 @@
 
   <PropertyGroup>
     <TargetFrameworks>net6.0;net8.0</TargetFrameworks>
+    <LangVersion>latest</LangVersion>
     <ImplicitUsings>enable</ImplicitUsings>
     <Nullable>enable</Nullable>
   </PropertyGroup>

Pilz.IO/Pilz.IO.csproj

@@ -2,9 +2,10 @@
   
   <PropertyGroup>
     <TargetFrameworks>net8.0</TargetFrameworks>
+    <LangVersion>latest</LangVersion>
     <Version>2.1.0</Version>
     <Nullable>enable</Nullable>
-    <ImplicitUsings>annotations</ImplicitUsings>
+    <ImplicitUsings>enable</ImplicitUsings>
   </PropertyGroup>
   
   <ItemGroup>

Pilz.Net.CloudProviders.Nextcloud/Pilz.Net.CloudProviders.Nextcloud.csproj

@@ -2,6 +2,7 @@
 
   <PropertyGroup>
     <TargetFrameworks>net6.0;net8.0</TargetFrameworks>
+    <LangVersion>latest</LangVersion>
     <ImplicitUsings>enable</ImplicitUsings>
     <Nullable>enable</Nullable>
   </PropertyGroup>

Pilz.Net/Pilz.Net.csproj

@@ -2,6 +2,7 @@
   
   <PropertyGroup>
     <TargetFrameworks>net8.0</TargetFrameworks>
+    <LangVersion>latest</LangVersion>
     <ImplicitUsings>enable</ImplicitUsings>
     <Nullable>enable</Nullable>
   </PropertyGroup>

Pilz.Plugins.Advanced.UI.Telerik/Pilz.Plugins.Advanced.UI.Telerik.csproj

@@ -2,6 +2,7 @@
 
   <PropertyGroup>
     <TargetFrameworks>net8.0-windows</TargetFrameworks>
+    <LangVersion>latest</LangVersion>
     <ImplicitUsings>enable</ImplicitUsings>
     <Nullable>enable</Nullable>
     <UseWindowsForms>true</UseWindowsForms>

Pilz.Plugins.Advanced.UI/Pilz.Plugins.Advanced.UI.csproj

@@ -2,6 +2,7 @@
 
   <PropertyGroup>
     <TargetFrameworks>net8.0-windows</TargetFrameworks>
+    <LangVersion>latest</LangVersion>
     <ImplicitUsings>enable</ImplicitUsings>
     <Nullable>enable</Nullable>
     <UseWindowsForms>true</UseWindowsForms>

Pilz.Plugins.Advanced/Pilz.Plugins.Advanced.csproj

@@ -2,6 +2,7 @@
   
   <PropertyGroup>
     <TargetFrameworks>net8.0</TargetFrameworks>
+    <LangVersion>latest</LangVersion>
     <ImplicitUsings>enable</ImplicitUsings>
     <Nullable>enable</Nullable>
   </PropertyGroup>

Pilz.Plugins/Pilz.Plugins.csproj

@@ -2,6 +2,7 @@
 
   <PropertyGroup>
     <TargetFrameworks>net8.0</TargetFrameworks>
+    <LangVersion>latest</LangVersion>
     <ImplicitUsings>enable</ImplicitUsings>
     <Nullable>enable</Nullable>
   </PropertyGroup>

Pilz.Simple3DFileParser/Pilz.Simple3DFileParser.vbproj

@@ -3,6 +3,7 @@
     <StartupObject />
     <RootNamespace>Pilz.S3DFileParser</RootNamespace>
     <TargetFrameworks>net8.0</TargetFrameworks>
+    <LangVersion>latest</LangVersion>
     <NoWarn>42016,41999,42017,42018,42019,42032,42036,42020,42021,42022</NoWarn>
     <DocumentationFile>Pilz.Simple3DFileParser.xml</DocumentationFile>
     <DefineTrace>true</DefineTrace>

Pilz.Threading/Pilz.Threading.vbproj

@@ -1,7 +1,8 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
     <MyType>Windows</MyType>
-    <TargetFrameworks>net6.0-windows;net8.0-windows</TargetFrameworks>
+    <TargetFrameworks>net6.0-windows;net8.0-windows;netframework4.8</TargetFrameworks>
+    <LangVersion>latest</LangVersion>
     <NoWarn>42016,41999,42017,42018,42019,42032,42036,42020,42021,42022</NoWarn>
     <DocumentationFile>Pilz.Threading.xml</DocumentationFile>
     <DefineTrace>true</DefineTrace>

Pilz.UI.Telerik/Dialogs/RadFlyoutBase.cs

@@ -100,11 +100,6 @@ public partial class RadFlyoutBase : UserControl
         ParentChanged += FlyoutDialogBase_ParentChanged;
     }
 
-    [MemberNotNull(nameof(radButton_Cancel))]
-    [MemberNotNull(nameof(radButton_Confirm))]
-    [MemberNotNull(nameof(tableLayoutPanel_ActionPanel))]
-    [MemberNotNull(nameof(tableLayoutPanel_TitlePanel))]
-    [MemberNotNull(nameof(radLabel_Title))]
     private void InitializeComponent()
     {
         // radButton_Cancel

Pilz.UI.Telerik/Extensions/RadFlyoutBaseExtensions.cs

@@ -5,7 +5,7 @@ namespace Pilz.UI.Telerik.Extensions.Extensions;
 
 public static class RadFlyoutBaseExtensions
 {
-    public static bool IsValid([NotNullWhen(true)] this RadFlyoutBase? @this)
+    public static bool IsValid(this RadFlyoutBase? @this)
     {
         return @this != null && @this.Result == DialogResult.OK;
     }

Pilz.UI.Telerik/Extensions/RadListDataItemCollectionExtensions.cs

@@ -16,15 +16,16 @@ public static class RadListDataItemCollectionExtensions
 
     public static IEnumerable<RadListDataItem> AddEnumValues<T>(this RadListDataItemCollection @this, bool clearCollection, Func<T, bool>? filter, Func<T, string?>? format) where T : struct, Enum
     {
-        var values = Enum.GetValues<T>();
+        var values = Enum.GetValues(typeof(T));
         var items = new List<RadListDataItem>();
 
-        format ??= v => Enum.GetName(v);
+        if (format == null)
+            format = v => Enum.GetName(typeof(T), v);
 
         if (clearCollection)
             @this.Clear();
 
-        foreach (var value in values)
+        foreach (T value in values)
         {
             if (filter is null || filter(value))
                 items.Add(new(format(value), value));

Pilz.UI.Telerik/Pilz.UI.Telerik.csproj

@@ -1,14 +1,15 @@
 <Project Sdk="Microsoft.NET.Sdk">
   
   <PropertyGroup>
-    <TargetFrameworks>net8.0-windows</TargetFrameworks>
+    <TargetFrameworks>net8.0-windows;netframework4.8</TargetFrameworks>
+    <LangVersion>latest</LangVersion>
     <ImplicitUsings>enable</ImplicitUsings>
-    <Nullable>enable</Nullable>
+    <Nullable>annotations</Nullable>
     <UseWindowsForms>true</UseWindowsForms>
   </PropertyGroup>
   
   <PropertyGroup>
-    <Version>2.9.5</Version>
+    <Version>2.9.6</Version>
     <GenerateDocumentationFile>True</GenerateDocumentationFile>
   </PropertyGroup>
   

Pilz.UI/Dialogs/FlyoutBase.cs

@@ -84,11 +84,6 @@ public partial class FlyoutBase : UserControl
         ParentChanged += FlyoutBase_ParentChanged;
     }
 
-    [MemberNotNull(nameof(tableLayoutPanel_TitlePanel))]
-    [MemberNotNull(nameof(label_Title))]
-    [MemberNotNull(nameof(tableLayoutPanel_ActionPanel))]
-    [MemberNotNull(nameof(button_Cancel))]
-    [MemberNotNull(nameof(button_Accept))]
     private void InitializeComponent()
     {
         // button_Accept
@@ -180,7 +175,7 @@ public partial class FlyoutBase : UserControl
         base.OnLoad(e);
     }
 
-    private void FlyoutBase_ParentChanged(object? sender, EventArgs e)
+    private void FlyoutBase_ParentChanged(object sender, EventArgs e)
     {
         var frm = FindForm();
         if (frm != null)
@@ -214,13 +209,13 @@ public partial class FlyoutBase : UserControl
         tableLayoutPanel_TitlePanel.Visible = !string.IsNullOrWhiteSpace(label_Title.Text);
     }
 
-    protected virtual void Button_Accept_Click(object? sender, EventArgs e)
+    protected virtual void Button_Accept_Click(object sender, EventArgs e)
     {
         if (ValidateOK())
             Close(DialogResult.OK);
     }
 
-    protected virtual void Button_Cancel_Click(object? sender, EventArgs e)
+    protected virtual void Button_Cancel_Click(object sender, EventArgs e)
     {
         Close(DialogResult.Cancel);
     }

Pilz.UI/Extensions/FlyoutBaseExtensions.cs

@@ -5,7 +5,7 @@ namespace Pilz.UI.Extensions;
 
 public static class FlyoutBaseExtensions
 {
-    public static bool IsValid([NotNullWhen(true)] this FlyoutBase? @this)
+    public static bool IsValid(this FlyoutBase? @this)
     {
         return @this != null && @this.Result == DialogResult.OK;
     }

Pilz.UI/HighlightPanel.cs

@@ -225,7 +225,7 @@ internal class HighlightPanel : Control
         Pilz.Win32.Native.User32.GetWindowRect(control.Handle, ref rect);
         var pp = control.Parent.PointToClient(new Point(rect.Left + 3, rect.Top + 3));
         var handle = Pilz.Win32.Native.User32.ChildWindowFromPointEx(control.Parent.Handle, new Pilz.Win32.Native.POINT(pp.X, pp.Y), (uint)Pilz.Win32.Native.WindowFromPointFlags.CWP_SKIPINVISIBLE);
-        if (handle == nint.Zero)
+        if (handle == IntPtr.Zero)
             return control.Visible;
         var c = Control.FromHandle(handle);
 

Pilz.UI/Highlighter.cs

@@ -1,5 +1,4 @@
-using Microsoft.VisualBasic.CompilerServices;
+using System;
-using System;
 using System.Collections.Generic;
 using System.ComponentModel;
 using System.Drawing;
@@ -81,7 +80,7 @@ public class Highlighter : Component
 
     private void ControlHighlightVisibleChanged(object sender, EventArgs e)
     {
-        if (_HighlightPanel is not null && Conversions.ToBoolean(Operators.ConditionalCompareObjectEqual(_HighlightPanel.FocusHighlightControl, sender, false)))
+        if (_HighlightPanel is not null && sender.Equals(_HighlightPanel.FocusHighlightControl))
             UpdateHighlighterRegion();
     }
 

Pilz.UI/PaintingControl/PaintingControl.cs

@@ -1,5 +1,4 @@
-using Microsoft.VisualBasic.CompilerServices;
+using Pilz.Drawing;
-using Pilz.Drawing;
 using System;
 using System.Collections;
 using System.Collections.Generic;
@@ -94,7 +93,7 @@ public class PaintingControl : UserControl, IPaintingObjectContainer
     {
         get
         {
-            return Conversions.ToInteger(GetType().GetField("layoutSuspendCount", System.Reflection.BindingFlags.Instance | System.Reflection.BindingFlags.NonPublic).GetValue(this)) != 0;
+            return Convert.ToInt32(GetType().GetField("layoutSuspendCount", System.Reflection.BindingFlags.Instance | System.Reflection.BindingFlags.NonPublic).GetValue(this)) != 0;
         }
     }
 
@@ -545,8 +544,8 @@ public class PaintingControl : UserControl, IPaintingObjectContainer
     /// <param name="m"></param>
     protected override void WndProc(ref Message m)
     {
-        const int WM_NCHITTEST = 0x84;
+        const nint WM_NCHITTEST = 0x84;
-        const int HTTRANSPARENT = -1;
+        const nint HTTRANSPARENT = -1;
 
         if (!VisibleForMouseEvents && m.Msg == WM_NCHITTEST)
             m.Result = HTTRANSPARENT;

Pilz.UI/PaintingControl/PaintingObject.cs

@@ -1,5 +1,4 @@
-using Microsoft.VisualBasic.CompilerServices;
+using Newtonsoft.Json;
-using Newtonsoft.Json;
 using System;
 using System.Collections.Generic;
 using System.ComponentModel;
@@ -590,7 +589,7 @@ public class PaintingObject : ICloneable, IPaintingObjectContainer
         get
         {
             if (Tag is string)
-                return Conversions.ToString(Tag);
+                return Convert.ToString(Tag);
             else
             {
                 return string.Empty;

Pilz.UI/Pilz.UI.csproj

@@ -1,16 +1,16 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
     <MyType>Windows</MyType>
-    <TargetFrameworks>net8.0-windows</TargetFrameworks>
+    <TargetFrameworks>net8.0-windows;netframework4.8</TargetFrameworks>
+    <LangVersion>latest</LangVersion>
     <DocumentationFile>Pilz.UI.xml</DocumentationFile>
     <UseWindowsForms>true</UseWindowsForms>
     <DefaultItemExcludes>$(DefaultItemExcludes);$(ProjectDir)**\*.vb</DefaultItemExcludes>
-    <LangVersion>latest</LangVersion>
     <ImplicitUsings>enable</ImplicitUsings>
-    <Nullable>enable</Nullable>
+    <Nullable>annotations</Nullable>
   </PropertyGroup>
   <PropertyGroup>
-    <Version>2.4.5</Version>
+    <Version>2.4.6</Version>
   </PropertyGroup>
   <ItemGroup>
     <PackageReference Include="Newtonsoft.Json" Version="13.0.3" />

Pilz.UI/Resources.Designer.cs

@@ -25,7 +25,6 @@ namespace Pilz.UI.My.Resources
     [System.CodeDom.Compiler.GeneratedCode("System.Resources.Tools.StronglyTypedResourceBuilder", "17.0.0.0")]
     [DebuggerNonUserCode()]
     [System.Runtime.CompilerServices.CompilerGenerated()]
-    [HideModuleName()]
     internal static class Resources
     {
 

Pilz.Win32/Mapped/Keyboard.cs

@@ -1,6 +1,4 @@
-
+using Pilz.Win32.Native;
-using Microsoft.VisualBasic.CompilerServices;
-using Pilz.Win32.Native;
 using Keys = System.Windows.Forms.Keys;
 
 namespace Pilz.Win32.Mapped;
@@ -11,7 +9,7 @@ public class Keyboard
 
     public static bool IsKeyDown(int keyCode)
     {
-        return Conversions.ToDouble(User32.GetKeyState(keyCode).ToString() + 0x8000) < 0d;
+        return Convert.ToDouble(User32.GetKeyState(keyCode).ToString() + 0x8000) < 0d;
     }
 
     public static bool IsKeyDown(Keys keyCode)

Pilz.Win32/NativeTools.cs

@@ -8,8 +8,10 @@ public static class NativeTools
     [Obsolete("Use \"Environment.ProcessPath\" instead.")]
     public static string GetExecutablePath(bool checkRealOS = false)
     {
+#if NET8_0_OR_GREATER
         if (RuntimeInformationsEx.IsOSPlatform(OSType.Windows, checkRealOS))
             return Environment.ProcessPath;
+#endif
         return Process.GetCurrentProcess().MainModule.FileName;
     }
 }

Pilz.Win32/Pilz.Win32.csproj

@@ -1,9 +1,10 @@
 <Project Sdk="Microsoft.NET.Sdk">
   
   <PropertyGroup>
-    <TargetFrameworks>net8.0-windows</TargetFrameworks>
+    <TargetFrameworks>net8.0-windows;netframework4.8</TargetFrameworks>
+    <LangVersion>latest</LangVersion>
     <UseWindowsForms>true</UseWindowsForms>
-    <Version>2.1.0</Version>
+    <Version>2.1.1</Version>
     <ImplicitUsings>enable</ImplicitUsings>
     <Nullable>annotations</Nullable>
   </PropertyGroup>

Pilz/AppVersion.cs

@@ -66,7 +66,7 @@ public class AppVersion(Version version, int build, AppChannel channel) : ICompa
             throw new FormatException();
 
         if (input.StartsWith("version", StringComparison.InvariantCultureIgnoreCase))
-            input = input[7..];
+            input = input.Substring(7);
 
         var splitted = input.Trim().Split(' ');
 

Pilz/Pilz.csproj

@@ -1,11 +1,11 @@
 <Project Sdk="Microsoft.NET.Sdk">
   
   <PropertyGroup>
-    <TargetFrameworks>net8.0</TargetFrameworks>
+    <TargetFrameworks>net8.0;netstandard2.0</TargetFrameworks>
     <LangVersion>latest</LangVersion>
     <ImplicitUsings>enable</ImplicitUsings>
     <Nullable>annotations</Nullable>
-    <Version>2.3.0</Version>
+    <Version>2.3.1</Version>
   </PropertyGroup>
   
   <ItemGroup>