dotnet 8,以上才有 这个bin 的枚举

https://learn.microsoft.com/zh-cn/dotnet/api/system.globalization.numberstyles?view=net-8.0

src/Ursa/Controls/NumericUpDown/NumericUpDownBase.cs

@@ -356,7 +356,12 @@ public abstract class NumericUpDownBase<T> : NumericUpDown where T : struct, ICo
                 text = text.Substring(1);
             }
         }
-        else if (((int)numberStyles &/*  NumberStyles.AllowBinarySpecifier */ 1027) != 0)
+        else
+#if NET8_0_OR_GREATER
+        if ((numberStyles & NumberStyles.AllowBinarySpecifier) != 0)
+#else
+        if (((int)numberStyles &/*  NumberStyles.AllowBinarySpecifier */ 1027) != 0)
+#endif
         {
             if (text.StartsWith("0b") || text.StartsWith("0B")) // support 0b bin while user input
             {

src/Ursa/Ursa.csproj

@@ -3,7 +3,7 @@
     <Import Project="../Package.props"/>
 
     <PropertyGroup>
-        <TargetFramework>netstandard2.0</TargetFramework>
+        <TargetFrameworks>netstandard2.0;NET8</TargetFrameworks>
         <ImplicitUsings>enable</ImplicitUsings>
         <Nullable>enable</Nullable>
         <LangVersion>latest</LangVersion>