Use Path.Join instead of Path.Combine

src/Common/tests/TestUtilities/FileCleanupTestBase.cs

@@ -16,7 +16,7 @@ public string TestDirectory
         {
             if (_testDirectory is null)
             {
-                _testDirectory = Path.Combine(Path.GetTempPath(), GetUniqueName());
+                _testDirectory = Path.Join(Path.GetTempPath(), GetUniqueName());
                 Directory.CreateDirectory(_testDirectory);
             }
 
@@ -43,7 +43,7 @@ protected virtual void Dispose(bool disposing)
         }
     }
 
-    public string GetTestFilePath() => Path.Combine(TestDirectory, GetTestFileName());
+    public string GetTestFilePath() => Path.Join(TestDirectory, GetTestFileName());
 
     public static string GetTestFileName() => GetUniqueName();
 

src/Common/tests/TestUtilities/TempFile.cs

@@ -81,6 +81,6 @@ private void DeleteFile()
     private static string GetFilePath(string? memberName, int lineNumber)
     {
         string file = $"{IO.Path.GetRandomFileName()}_{memberName}_{lineNumber}";
-        return IO.Path.Combine(IO.Path.GetTempPath(), file);
+        return IO.Path.Join(IO.Path.GetTempPath(), file);
     }
 }

src/Microsoft.VisualBasic.Forms/src/Microsoft/VisualBasic/Logging/FileLogTraceListener.vb

@@ -166,7 +166,7 @@ Namespace Microsoft.VisualBasic.Logging
                         Debug.Fail("Unrecognized LogFileCreationSchedule")
                 End Select
 
-                Return Path.Combine(basePath, fileName)
+                Return Path.Join(basePath, fileName)
             End Get
         End Property
 

src/Microsoft.VisualBasic.Forms/tests/UnitTests/System/Windows/Forms/FileLogTraceListenerTests.vb

@@ -45,7 +45,7 @@ Namespace Microsoft.VisualBasic.Forms.Tests
                         listener.DiskSpaceExhaustedBehavior = DiskSpaceExhaustedOption.ThrowException
                         listener.DiskSpaceExhaustedBehavior.Should.Be(DiskSpaceExhaustedOption.ThrowException)
 
-                        listener.FullLogFileName.Should.BeEquivalentTo(Path.Combine(testDirectory, $"{expectedBaseFileName}.log"))
+                        listener.FullLogFileName.Should.BeEquivalentTo(Path.Join(testDirectory, $"{expectedBaseFileName}.log"))
 
                         listener.LogFileCreationSchedule.Should.Be(LogFileCreationScheduleOption.None)
                         listener.LogFileCreationSchedule = LogFileCreationScheduleOption.Daily

src/Microsoft.VisualBasic.Forms/tests/UnitTests/System/Windows/Forms/VbFileCleanupTestBaseTests.vb

@@ -32,7 +32,7 @@ Namespace Microsoft.VisualBasic.Forms.Tests
 
         <WinFormsFact>
         Public Sub DirectoryIsAccessibleWithNonexistentPath()
-            Dim directoryPath As String = Path.Combine(CreateTempDirectory(), GetUniqueFileName)
+            Dim directoryPath As String = Path.Join(CreateTempDirectory(), GetUniqueFileName)
             DirectoryIsAccessible(directoryPath).Should.BeFalse()
         End Sub
 

src/Microsoft.VisualBasic.Forms/tests/UnitTests/System/Windows/TestUtilities/VbFileCleanupTestBase.vb

@@ -9,7 +9,7 @@ Namespace Microsoft.VisualBasic.Forms.Tests
     Public MustInherit Class VbFileCleanupTestBase
         Implements IDisposable
 
-        Private Shared ReadOnly s_baseTempPath As String = Path.Combine(Path.GetTempPath, "DownLoadTest9d9e3a8-7a46-4333-a0eb-4faf76994801")
+        Private Shared ReadOnly s_baseTempPath As String = Path.Join(Path.GetTempPath, "DownLoadTest9d9e3a8-7a46-4333-a0eb-4faf76994801")
         Friend Const DefaultFileName As String = "Testing.Txt"
         Friend ReadOnly _testDirectories As New HashSet(Of String)
 
@@ -46,7 +46,7 @@ Namespace Microsoft.VisualBasic.Forms.Tests
         '''  If size = -1 no file is create but the full path is returned.
         ''' </returns>
         Friend Shared Function CreateTempFile(sourceDirectoryName As String, Optional filename As String = DefaultFileName, Optional size As Integer = -1) As String
-            Dim filenameWithPath As String = Path.Combine(sourceDirectoryName, filename)
+            Dim filenameWithPath As String = Path.Join(sourceDirectoryName, filename)
 
             If size >= 0 Then
                 Using destinationStream As FileStream = File.Create(filenameWithPath)
@@ -68,7 +68,7 @@ Namespace Microsoft.VisualBasic.Forms.Tests
                 If Not info.Exists Then
                     Return False
                 End If
-                Dim path As String = IO.Path.Combine(directoryPath, GetUniqueFileName())
+                Dim path As String = IO.Path.Join(directoryPath, GetUniqueFileName())
                 Using stream As FileStream = File.Create(path)
                     stream.Close()
                 End Using
@@ -82,7 +82,7 @@ Namespace Microsoft.VisualBasic.Forms.Tests
         End Function
 
         Friend Shared Function GetUniqueFileNameWithPath(testDirectory As String) As String
-            Return Path.Combine(testDirectory, GetUniqueFileName())
+            Return Path.Join(testDirectory, GetUniqueFileName())
         End Function
 
         ''' <summary>
@@ -96,9 +96,9 @@ Namespace Microsoft.VisualBasic.Forms.Tests
         Friend Function CreateTempDirectory(<CallerMemberName> Optional memberName As String = Nothing, Optional lineNumber As Integer = -1) As String
             Dim folder As String
             If lineNumber > 0 Then
-                folder = Path.Combine(BaseTempPath, $"{memberName}{lineNumber}")
+                folder = Path.Join(BaseTempPath, $"{memberName}{lineNumber}")
             Else
-                folder = Path.Combine(BaseTempPath, memberName)
+                folder = Path.Join(BaseTempPath, memberName)
             End If
 
             If _testDirectories.Add(folder) Then

src/Microsoft.VisualBasic/tests/IntegrationTests/Microsoft.VisualBasic.IntegrationTests/InteractionTests.cs

@@ -104,7 +104,7 @@ public void Shell_ArgumentNullException()
     [Fact]
     public void Shell_FileNotFoundException()
     {
-        string path = Path.Combine(Path.GetTempPath(), GetUniqueName());
+        string path = Path.Join(Path.GetTempPath(), GetUniqueName());
         // Exception.ToString() called to verify message is constructed successfully.
         _ = Assert.Throws<FileNotFoundException>(() => Interaction.Shell(path)).ToString();
     }

src/Microsoft.VisualBasic/tests/UnitTests/Microsoft/VisualBasic/Devices/AudioTests.cs

@@ -49,7 +49,7 @@ public void PlayEmptyFileNameAudioMode_Throws(string fileName)
     [InvalidEnumData<AudioPlayMode>]
     public void PlayModeInvalid_Throws(AudioPlayMode audioPlayMode)
     {
-        string location = Path.Combine(Path.GetTempPath(), GetUniqueName());
+        string location = Path.Join(Path.GetTempPath(), GetUniqueName());
         Audio audio = new();
         Action testCode = () => audio.Play(location, audioPlayMode);
         testCode.Should().Throw<InvalidEnumArgumentException>();