Removed (Int64) cast statements from RemoveItemsRange when checking for overflow...

Commit migrated from https://github.com/dotnet/coreclr/commit/39be7e55798e4f81c531661b0df798e91c7d5936

diff --git a/src/libraries/System.Private.CoreLib/src/System/Collections/ObjectModel/Collection.cs b/src/libraries/System.Private.CoreLib/src/System/Collections/ObjectModel/Collection.cs
index 16939e4..8aa387b 100644 (file)
--- a/src/libraries/System.Private.CoreLib/src/System/Collections/ObjectModel/Collection.cs
+++ b/src/libraries/System.Private.CoreLib/src/System/Collections/ObjectModel/Collection.cs
@@ -217,7 +217,7 @@ namespace System.Collections.ObjectModel
                 ThrowHelper.ThrowArgumentOutOfRangeException(ExceptionArgument.count, ExceptionResource.ArgumentOutOfRange_NeedNonNegNum);
             }
 
-            if ((Int64)index + (Int64)count > items.Count)
+            if (index > items.Count - count)
             {
                 ThrowHelper.ThrowArgumentException(ExceptionResource.Argument_InvalidOffLen);
             }