Use helpers in Guid's ROS<byte> constructor (#78446)

* Use helpers in Guid's ROS<byte> constructor

* Condense Guid ROS<byte> constructor with a ternary

* Remove ReadGuidLittleEndian helper

* Add [StackTraceHidden] to Guid.ThrowArgumentException

* Revert accidental whitespace change

diff --git a/src/libraries/System.Private.CoreLib/src/System/Guid.cs b/src/libraries/System.Private.CoreLib/src/System/Guid.cs
index 63f4466..1ce66bb 100644 (file)
--- a/src/libraries/System.Private.CoreLib/src/System/Guid.cs
+++ b/src/libraries/System.Private.CoreLib/src/System/Guid.cs
@@ -50,7 +50,7 @@ namespace System
         {
             if (b.Length != 16)
             {
-                throw new ArgumentException(SR.Format(SR.Arg_GuidArrayCtor, "16"), nameof(b));
+                ThrowArgumentException();
             }
 
             if (BitConverter.IsLittleEndian)
@@ -71,6 +71,12 @@ namespace System
             _h = b[12];
             _i = b[13];
             _j = b[14];
+
+            [StackTraceHidden]
+            static void ThrowArgumentException()
+            {
+                throw new ArgumentException(SR.Format(SR.Arg_GuidArrayCtor, "16"), nameof(b));
+            }
         }
 
         [CLSCompliant(false)]