Fix BigInteger outerloop test failure (#64402)

Author: danmoseley

src/libraries/System.Runtime.Numerics/src/System/Numerics/BigNumber.cs

@@ -317,7 +317,7 @@ internal static bool TryValidateParseStyleInteger(NumberStyles style, [NotNullWh
             { // Check for hex number
                 if ((style & ~NumberStyles.HexNumber) != 0)
                 {
-                    e = new ArgumentException(SR.Argument_InvalidHexStyle);
+                    e = new ArgumentException(SR.Argument_InvalidHexStyle, nameof(style));
                     return false;
                 }
             }

src/libraries/System.Runtime.Numerics/tests/BigInteger/parse.cs

@@ -18,7 +18,7 @@ public class parseTest
 
         // Invariant culture is commonly used for (de-)serialization and similar to en-US
         // Ukrainian (Ukraine) added to catch regressions (https://github.com/dotnet/runtime/issues/14545)
-        // Current cultue to get additional value out of glob/loc test runs
+        // Current culture to get additional value out of glob/loc test runs
         public static IEnumerable<object[]> Cultures
         {
             get
@@ -66,11 +66,11 @@ public static void RunParseToStringTests(CultureInfo culture)
                 //invalid number style
                 // ******InvalidNumberStyles
                 NumberStyles invalid = (NumberStyles)0x7c00;
-                AssertExtensions.Throws<ArgumentException>(null, () =>
+                AssertExtensions.Throws<ArgumentException>("style", () =>
                 {
                     BigInteger.Parse("1", invalid).ToString("d");
                 });
-                AssertExtensions.Throws<ArgumentException>(null, () =>
+                AssertExtensions.Throws<ArgumentException>("style", () =>
                 {
                     BigInteger junk;
                     BigInteger.TryParse("1", invalid, null, out junk);
@@ -116,6 +116,16 @@ public void Parse_Hex32Bits()
 
             Assert.True(BigInteger.TryParse("080000001", NumberStyles.HexNumber, null, out result));
             Assert.Equal(0x80000001u, result);
+
+            Assert.Throws<FormatException>(() =>
+            {
+                BigInteger.Parse("zzz", NumberStyles.HexNumber);
+            });
+
+            AssertExtensions.Throws<ArgumentException>("style", () =>
+            {
+                BigInteger.Parse("1", NumberStyles.AllowHexSpecifier | NumberStyles.AllowCurrencySymbol);
+            });
         }
 
         private static void RunFormatProviderParseStrings()