Fix all failures in Security.Cryptography.Encoding.Tests on ILC

Author: Atsushi Kanamori

src/System.Security.Cryptography.Encoding/tests/AsnEncodedDataCollectionTests.cs

@@ -124,10 +124,13 @@ public static void CopyExceptions()
             Assert.Throws<ArgumentOutOfRangeException>(() => c.CopyTo(a, 3));
             Assert.Throws<ArgumentException>(() => c.CopyTo(a, 1));
 
-            // Array has non-zero lower bound
-            ICollection ic = c;
-            Array array = Array.CreateInstance(typeof(object), new int[] { 10 }, new int[] { 10 });
-            Assert.Throws<IndexOutOfRangeException>(() => ic.CopyTo(array, 0));
+            if (PlatformDetection.IsNonZeroLowerBoundArraySupported)
+            {
+                // Array has non-zero lower bound
+                ICollection ic = c;
+                Array array = Array.CreateInstance(typeof(object), new int[] { 10 }, new int[] { 10 });
+                Assert.Throws<IndexOutOfRangeException>(() => ic.CopyTo(array, 0));
+            }
         }
 
 

src/System.Security.Cryptography.Encoding/tests/OidCollectionTests.cs

@@ -127,7 +127,7 @@ private static void ValidateCopyToThrows(
             additionalValidation?.Invoke(c);
         }
 
-        [Fact]
+        [ConditionalFact(nameof(PlatformDetection) + "." + nameof(PlatformDetection.IsNonZeroLowerBoundArraySupported))]
         public void CopyTo_NonZeroLowerBound_ThrowsIndexOutOfRangeException()
         {
             Oid item = new Oid(Sha1Oid, Sha1Name);

src/System.Security.Cryptography.Encoding/tests/System.Security.Cryptography.Encoding.Tests.csproj

@@ -26,9 +26,12 @@
     <Compile Include="$(CommonTestPath)\System\AssertExtensions.cs">
       <Link>Common\System\AssertExtensions.cs</Link>
     </Compile>
+    <Compile Include="$(CommonTestPath)\System\PlatformDetection.cs">
+      <Link>Common\System\PlatformDetection.cs</Link>
+    </Compile>
     <Compile Include="$(CommonTestPath)\System\Security\Cryptography\ByteUtils.cs">
       <Link>CommonTest\System\Security\Cryptography\ByteUtils.cs</Link>
     </Compile>
   </ItemGroup>
   <Import Project="$([MSBuild]::GetDirectoryNameOfFileAbove($(MSBuildThisFileDirectory), dir.targets))\dir.targets" />
-</Project>
+</Project>