Proving #573 is not an issue

src/Parquet.Test/Serialisation/ParquetSerializerTest.cs

@@ -1078,5 +1078,28 @@ public async Task Class_With_Nullable_Struct() {
 
             Assert.Equivalent(data2, data);
         }
+
+        class EdgeCaseInt32 {
+            public int Id { get; set; }
+        }
+
+        [Fact]
+        public async Task EdgeCase_rawint64_to_classInt32() {
+            var schema = new ParquetSchema(new DataField<long>("Id"));
+            using var ms = new MemoryStream();
+            using(ParquetWriter writer = await ParquetWriter.CreateAsync(schema, ms)) {
+                using(ParquetRowGroupWriter rg = writer.CreateRowGroup()) {
+                    await rg.WriteColumnAsync(new DataColumn(schema.DataFields[0], new long[] { 1, 2, 3 }));
+                }
+            }
+            ms.Position = 0;
+
+            IList<EdgeCaseInt32> data = await ParquetSerializer.DeserializeAsync<EdgeCaseInt32>(ms);
+
+            Assert.Equal(1, data[0].Id);
+            Assert.Equal(2, data[1].Id);
+            Assert.Equal(3, data[2].Id);
+
+        }
     }
 }