From b04d7c58a072c3cda9ded58c8f5108380fcc548f Mon Sep 17 00:00:00 2001
From: NewellClark <newellofthefuture@gmail.com>
Date: Sat, 13 Feb 2021 22:51:56 -0500
Subject: [PATCH] Fix violation in System.Private.DataContractSerialization

- Prefer 'AsSpan' over 'Substring' when span-based overloads are available.
---
 .../src/System/Runtime/Serialization/DataContract.cs            | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/libraries/System.Private.DataContractSerialization/src/System/Runtime/Serialization/DataContract.cs b/src/libraries/System.Private.DataContractSerialization/src/System/Runtime/Serialization/DataContract.cs
index 008658e6aad03b..7d667cf1728d84 100644
--- a/src/libraries/System.Private.DataContractSerialization/src/System/Runtime/Serialization/DataContract.cs
+++ b/src/libraries/System.Private.DataContractSerialization/src/System/Runtime/Serialization/DataContract.cs
@@ -1550,7 +1550,7 @@ internal static List<int> GetDataContractNameForGenericName(string typeName, Str
                 if (endIndex < 0)
                 {
                     if (localName != null)
-                        localName.Append(typeName.Substring(startIndex));
+                        localName.Append(typeName.AsSpan(startIndex));
                     nestedParamCounts.Add(0);
                     break;
                 }