Fix Windows file handle release after reads

src/CellSharp/Internal/XlsxStream.cs

@@ -25,17 +25,8 @@ internal static SpreadsheetDocument Open(Stream stream, ExcelReadOptions? option
     internal static SpreadsheetDocument Open(string path, ExcelReadOptions? options = null)
     {
         var readOptions = options ?? ExcelReadOptions.Default;
-        var stream = new FileStream(path, FileMode.Open, FileAccess.Read, FileShare.Read);
-        try
-        {
-            ValidatePackageLength(stream.Length, readOptions.MaxPackageBytes);
-            return SpreadsheetDocument.Open(stream, false, OpenSettings(readOptions));
-        }
-        catch
-        {
-            stream.Dispose();
-            throw;
-        }
+        ValidatePackageLength(new FileInfo(path).Length, readOptions.MaxPackageBytes);
+        return SpreadsheetDocument.Open(path, false, OpenSettings(readOptions));
     }
 
     internal static void CompleteWrite(Stream stream) => stream.Position = stream.Length;

tests/CellSharp.Tests/ExcelReadTests.cs

@@ -44,6 +44,26 @@ public void ReadRoundTripsWrittenRows()
         }
     }
 
+    [Fact]
+    public void ReadReleasesTheSourceFile()
+    {
+        var path = TemporaryPath();
+
+        try
+        {
+            Excel.Write(path, [new SimpleCustomer { Id = 1, Name = "Ada", Active = true }]);
+
+            var result = Excel.Read<SimpleCustomer>(path);
+
+            Assert.True(result.IsValid);
+            using var exclusiveAccess = new FileStream(path, FileMode.Open, FileAccess.ReadWrite, FileShare.None);
+        }
+        finally
+        {
+            Delete(path);
+        }
+    }
+
     [Fact]
     public void ReadMapsColumnsInAnyOrder()
     {