feat: Added .NET Standard 2.1 support

Author: thargy

DevDecoder.DynamicXml/DevDecoder.DynamicXml.csproj

@@ -1,7 +1,8 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
     <PropertyGroup>
-        <TargetFramework>net6.0</TargetFramework>
+        <TargetFrameworks>net6.0;netstandard2.1</TargetFrameworks>
+        <LangVersion>10.0</LangVersion>
         <Nullable>enable</Nullable>
         <RootNamespace>DevDecoder.DynamicXml</RootNamespace>
         <PackageId>DevDecoder.DynamicXml</PackageId>

DevDecoder.DynamicXml/DynamicXObject.cs

@@ -229,26 +229,4 @@ private static IEnumerable<IDynamicXFilter> Flatten(this object[] indices, bool
             }
         }
     }
-
-
-    /// <summary>
-    ///     Returns the number as an ordinal.
-    /// </summary>
-    /// <param name="number">The number</param>
-    /// <param name="provider">The format provider</param>
-    /// <returns>The ordinal string.</returns>
-    [MethodImpl(MethodImplOptions.AggressiveInlining)]
-    internal static string ToOrdinal(this long number, IFormatProvider? provider = null)
-    {
-        var abs = Math.Abs(number);
-        return abs / 10 == 1
-            ? string.Create(provider, stackalloc char[64], $"{number}th")
-            : (abs % 10) switch
-            {
-                1 => string.Create(provider, stackalloc char[64], $"{number}st"),
-                2 => string.Create(provider, stackalloc char[64], $"{number}nd"),
-                3 => string.Create(provider, stackalloc char[64], $"{number}rd"),
-                _ => string.Create(provider, stackalloc char[64], $"{number}th")
-            };
-    }
 }

DevDecoder.DynamicXml/IsExternalInit.cs

@@ -0,0 +1,13 @@
+using System.ComponentModel;
+
+// SHIM To allow record support in .NET Standard
+#if NETSTANDARD2_1
+// ReSharper disable once CheckNamespace
+namespace System.Runtime.CompilerServices
+{
+    [EditorBrowsable(EditorBrowsableState.Never)]
+    public static class IsExternalInit
+    {
+    }
+}
+#endif