Remove #region directives from test files

Replace #region/#endregion with section comments per coding standards.
Affected files:
- AudioPropertiesTests.cs
- DisposeTests.cs
- DsdApiConsistencyTests.cs
- SaveToFileConvenienceTests.cs

Author: decriptor

tests/TagLibSharp2.Tests/Core/AudioPropertiesTests.cs

@@ -164,7 +164,7 @@ public void FromFlac_LargeFile_HandlesUlongSamples ()
 		Assert.AreEqual (4608, props.Bitrate);
 	}
 
-	#region DSD Format Tests
+	// ===== DSD Format Tests =====
 
 	[TestMethod]
 	public void FromDsf_DSD64Stereo_CalculatesCorrectBitrate ()
@@ -255,6 +255,4 @@ public void FromDff_DSD1024With6Channels_NoOverflow ()
 		Assert.AreEqual (270950, props.Bitrate);
 		Assert.IsTrue (props.IsValid);
 	}
-
-	#endregion
 }

tests/TagLibSharp2.Tests/Core/DisposeTests.cs

@@ -14,7 +14,7 @@ namespace TagLibSharp2.Tests.Core;
 [TestCategory ("Dispose")]
 public class DisposeTests
 {
-	#region FlacFile Dispose Tests
+	// ===== FlacFile Dispose Tests =====
 
 	[TestMethod]
 	public void FlacFile_Dispose_ClearsReferences ()
@@ -45,9 +45,7 @@ public void FlacFile_DoubleDispose_DoesNotThrow ()
 		file.Dispose (); // Should not throw
 	}
 
-	#endregion
-
-	#region OggVorbisFile Dispose Tests
+	// ===== OggVorbisFile Dispose Tests =====
 
 	[TestMethod]
 	public void OggVorbisFile_Dispose_ClearsReferences ()
@@ -78,9 +76,7 @@ public void OggVorbisFile_DoubleDispose_DoesNotThrow ()
 		file.Dispose ();
 	}
 
-	#endregion
-
-	#region OggOpusFile Dispose Tests
+	// ===== OggOpusFile Dispose Tests =====
 
 	[TestMethod]
 	public void OggOpusFile_Dispose_ClearsReferences ()
@@ -111,9 +107,7 @@ public void OggOpusFile_DoubleDispose_DoesNotThrow ()
 		file.Dispose ();
 	}
 
-	#endregion
-
-	#region Mp4File Dispose Tests
+	// ===== Mp4File Dispose Tests =====
 
 	[TestMethod]
 	public void Mp4File_Dispose_ClearsReferences ()
@@ -144,9 +138,7 @@ public void Mp4File_DoubleDispose_DoesNotThrow ()
 		file.Dispose ();
 	}
 
-	#endregion
-
-	#region WavFile Dispose Tests
+	// ===== WavFile Dispose Tests =====
 
 	[TestMethod]
 	public void WavFile_Dispose_ClearsReferences ()
@@ -177,9 +169,7 @@ public void WavFile_DoubleDispose_DoesNotThrow ()
 		file.Dispose ();
 	}
 
-	#endregion
-
-	#region AiffFile Dispose Tests
+	// ===== AiffFile Dispose Tests =====
 
 	[TestMethod]
 	public void AiffFile_Dispose_ClearsReferences ()
@@ -210,6 +200,4 @@ public void AiffFile_DoubleDispose_DoesNotThrow ()
 		file.Dispose ();
 		file.Dispose ();
 	}
-
-	#endregion
 }

tests/TagLibSharp2.Tests/Core/DsdApiConsistencyTests.cs

@@ -17,7 +17,7 @@ namespace TagLibSharp2.Tests.Core;
 [TestCategory ("Consistency")]
 public class DsdApiConsistencyTests
 {
-	#region Property Type Consistency Tests
+	// ===== Property Type Consistency Tests =====
 
 	[TestMethod]
 	public void DsfFile_SampleRate_IsInt ()
@@ -90,9 +90,7 @@ public void DffFile_BitsPerSample_PropertyExists ()
 		Assert.AreEqual (1, bitsPerSample);
 	}
 
-	#endregion
-
-	#region SampleCount Consistency Tests
+	// ===== SampleCount Consistency Tests =====
 
 	[TestMethod]
 	public void DsfFile_SampleCount_IsPublic ()
@@ -117,9 +115,7 @@ public void DffFile_SampleCount_IsPublic ()
 		Assert.IsTrue (sampleCount > 0);
 	}
 
-	#endregion
-
-	#region SaveToFile API Consistency Tests
+	// ===== SaveToFile API Consistency Tests =====
 
 	[TestMethod]
 	public void DffFile_SaveToFile_WithPathAndFileSystem_Exists ()
@@ -210,9 +206,7 @@ public async Task DffFile_SaveToFileAsync_WithPath_Exists ()
 		Assert.AreEqual ("Async Test", reparsed.File!.Id3v2Tag!.Title);
 	}
 
-	#endregion
-
-	#region AudioProperties Consistency Tests
+	// ===== AudioProperties Consistency Tests =====
 
 	[TestMethod]
 	public void DsfAudioProperties_Channels_MatchesFileChannels ()
@@ -236,9 +230,7 @@ public void DffAudioProperties_Channels_MatchesFileChannels ()
 		Assert.AreEqual (result.File!.Channels, result.File.Properties!.Channels);
 	}
 
-	#endregion
-
-	#region Helper Methods
+	// ===== Helper Methods =====
 
 	private static byte[] CreateMinimalDsfFile ()
 	{
@@ -380,6 +372,4 @@ private static void WriteUInt16BE (Stream s, ushort v)
 		s.WriteByte ((byte)(v >> 8));
 		s.WriteByte ((byte)v);
 	}
-
-	#endregion
 }

tests/TagLibSharp2.Tests/Core/SaveToFileConvenienceTests.cs

@@ -117,7 +117,7 @@ static byte[] CreateMinimalOggVorbis ()
 		return builder.ToBinaryData ().ToArray ();
 	}
 
-	#region Mp3File Tests
+	// ===== Mp3File Tests =====
 
 	[TestMethod]
 	public void Mp3File_ReadFromFile_SetsSourcePath ()
@@ -193,9 +193,7 @@ public void Mp3File_SaveToFile_NoSourcePath_Fails ()
 		Assert.IsTrue (saveResult.Error!.Contains ("source"));
 	}
 
-	#endregion
-
-	#region FlacFile Tests
+	// ===== FlacFile Tests =====
 
 	[TestMethod]
 	public void FlacFile_ReadFromFile_SetsSourcePath ()
@@ -270,9 +268,7 @@ public void FlacFile_SaveToFile_NoSourcePath_Fails ()
 		Assert.IsTrue (saveResult.Error!.Contains ("source"));
 	}
 
-	#endregion
-
-	#region OggVorbisFile Tests
+	// ===== OggVorbisFile Tests =====
 
 	[TestMethod]
 	public void OggVorbisFile_ReadFromFile_SetsSourcePath ()
@@ -346,6 +342,4 @@ public void OggVorbisFile_SaveToFile_NoSourcePath_Fails ()
 		Assert.IsFalse (saveResult.IsSuccess);
 		Assert.IsTrue (saveResult.Error!.Contains ("source"));
 	}
-
-	#endregion
 }