From dd69c726b54b07940cd3e45fd65bdd1c6378ded2 Mon Sep 17 00:00:00 2001
From: Jan Kotas <jkotas@microsoft.com>
Date: Mon, 26 Dec 2016 00:08:01 -0800
Subject: [PATCH] Delete unused file

Commit migrated from https://github.com/dotnet/coreclr/commit/cd7ab891d2d0c961a32f0779125ce9190b6ce9e3
---
 .../System/IO/PathInternal.CaseSensitivity.cs      | 75 ----------------------
 .../src/mscorlib/mscorlib.shared.sources.props     |  1 -
 2 files changed, 76 deletions(-)
 delete mode 100644 src/coreclr/src/mscorlib/corefx/System/IO/PathInternal.CaseSensitivity.cs

diff --git a/src/coreclr/src/mscorlib/corefx/System/IO/PathInternal.CaseSensitivity.cs b/src/coreclr/src/mscorlib/corefx/System/IO/PathInternal.CaseSensitivity.cs
deleted file mode 100644
index bea2df9..0000000
--- a/src/coreclr/src/mscorlib/corefx/System/IO/PathInternal.CaseSensitivity.cs
+++ /dev/null
@@ -1,75 +0,0 @@
-// Licensed to the .NET Foundation under one or more agreements.
-// The .NET Foundation licenses this file to you under the MIT license.
-// See the LICENSE file in the project root for more information.
-
-using System.Diagnostics;
-
-namespace System.IO
-{
-    /// <summary>Contains internal path helpers that are shared between many projects.</summary>
-    internal static partial class PathInternal
-    {
-        private enum Tristate : byte
-        {
-            NotInitialized,
-            True,
-            False,
-        }
-
-        private static Tristate s_isCaseSensitive = Tristate.NotInitialized;
-
-        /// <summary>Returns a comparison that can be used to compare file and directory names for equality.</summary>
-        internal static StringComparison StringComparison
-        {
-            get
-            {
-                return IsCaseSensitive ?
-                    StringComparison.Ordinal :
-                    StringComparison.OrdinalIgnoreCase;
-            }
-        }
-
-        /// <summary>Gets whether the system is case-sensitive.</summary>
-        internal static bool IsCaseSensitive
-        {
-            get
-            {
-                // This must be lazily initialized as there are dependencies on PathInternal's static constructor
-                // being fully initialized. (GetIsCaseSensitive() calls GetFullPath() which needs to use PathInternal)
-                if (s_isCaseSensitive == Tristate.NotInitialized)
-                    s_isCaseSensitive = GetIsCaseSensitive() ? Tristate.True : Tristate.False;
-
-                return s_isCaseSensitive == Tristate.True;
-            }
-        }
-
-        /// <summary>
-        /// Determines whether the file system is case sensitive.
-        /// </summary>
-        /// <remarks>
-        /// Ideally we'd use something like pathconf with _PC_CASE_SENSITIVE, but that is non-portable, 
-        /// not supported on Windows or Linux, etc. For now, this function creates a tmp file with capital letters 
-        /// and then tests for its existence with lower-case letters.  This could return invalid results in corner 
-        /// cases where, for example, different file systems are mounted with differing sensitivities.
-        /// </remarks>
-        private static bool GetIsCaseSensitive()
-        {
-            try
-            {
-                string pathWithUpperCase = Path.Combine(Path.GetTempPath(), "CASESENSITIVETEST" + Guid.NewGuid().ToString("N"));
-                using (new FileStream(pathWithUpperCase, FileMode.CreateNew, FileAccess.ReadWrite, FileShare.None, 0x1000, FileOptions.DeleteOnClose))
-                {
-                    string lowerCased = pathWithUpperCase.ToLowerInvariant();
-                    return !File.Exists(lowerCased);
-                }
-            }
-            catch (Exception exc)
-            {
-                // In case something goes terribly wrong, we don't want to fail just because
-                // of a casing test, so we assume case-insensitive-but-preserving.
-                Debug.Fail("Casing test failed: " + exc);
-                return false;
-            }
-        }
-    }
-}
diff --git a/src/coreclr/src/mscorlib/mscorlib.shared.sources.props b/src/coreclr/src/mscorlib/mscorlib.shared.sources.props
index ffac0f3..ffb6364 100644
--- a/src/coreclr/src/mscorlib/mscorlib.shared.sources.props
+++ b/src/coreclr/src/mscorlib/mscorlib.shared.sources.props
@@ -783,7 +783,6 @@
   <ItemGroup>
     <IoSources Include="$(CoreFxSourcesRoot)\System\IO\Path.cs" />
     <IoSources Include="$(CoreFxSourcesRoot)\System\IO\PathInternal.cs" />
-    <IoSources Include="$(CoreFxSourcesRoot)\System\IO\PathInternal.CaseSensitivity.cs" />
   </ItemGroup>
   <ItemGroup Condition="'$(TargetsUnix)' == 'true'">
     <IoSources Include="$(CoreFxSourcesRoot)\System\IO\Path.Unix.cs" />
-- 
2.7.4