Lucene.Net.Search.Suggest.Fst.ExternalRefSorter: Changed temp path ge…

…neration to use FileSupport.CreateTempFile() with named prefix and extension because it more closely matches Lucene and makes the files more easily identifiable.

src/Lucene.Net.Suggest/Suggest/Fst/ExternalRefSorter.cs

@@ -1,4 +1,5 @@
-using Lucene.Net.Util;
+using Lucene.Net.Support.IO;
+using Lucene.Net.Util;
 using System;
 using System.IO;
 
@@ -39,7 +40,7 @@ public class ExternalRefSorter : IBytesRefSorter, IDisposable
         public ExternalRefSorter(OfflineSorter sort)
         {
             this.sort = sort;
-            this.input = new FileInfo(Path.Combine(Path.GetTempPath(), Path.GetRandomFileName()));
+            this.input = FileSupport.CreateTempFile("RefSorter-", ".raw", OfflineSorter.GetDefaultTempDir());
             this.writer = new OfflineSorter.ByteSequencesWriter(input);
         }
 
@@ -58,7 +59,7 @@ public virtual IBytesRefEnumerator GetEnumerator()
             {
                 CloseWriter();
 
-                sorted = new FileInfo(Path.Combine(Path.GetTempPath(), Path.GetRandomFileName()));
+                sorted = FileSupport.CreateTempFile("RefSorter-", ".sorted", OfflineSorter.GetDefaultTempDir());
                 sort.Sort(input, sorted);
 
                 input.Delete();