apacheGH-38297: [C#] Fix build for .NET 4.7.2 (apache#38299)

### What changes are included in this PR? Fixes apache#38297 ### Are these changes tested? Yes * Closes: apache#38297
dgreiss · Feb 17, 2024 · b500655 · b500655
1 parent 1df8f99
commit b500655
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Showing 2 changed files with 7 additions and 3 deletions.
diff --git a/csharp/test/Apache.Arrow.Tests/DurationArrayTests.cs b/csharp/test/Apache.Arrow.Tests/DurationArrayTests.cs
@@ -69,7 +69,11 @@ static TimeUnit RequiredPrecision(TimeSpan? timeSpan)
         {
             if (timeSpan == null) { return TimeUnit.Second; }
             if ((timeSpan.Value.Ticks % TicksPerMicrosecond) > 0) { return TimeUnit.Nanosecond; }
+#if NET5_0_OR_GREATER
             if (timeSpan.Value.Microseconds > 0) { return TimeUnit.Microsecond; }
+#else
+            if ((timeSpan.Value.Ticks % (TicksPerMicrosecond * 1000)) > 0) { return TimeUnit.Microsecond; }
+#endif
             if (timeSpan.Value.Milliseconds > 0) { return TimeUnit.Millisecond; }
             return TimeUnit.Second;
         }

diff --git a/csharp/test/Apache.Arrow.Tests/MapArrayTests.cs b/csharp/test/Apache.Arrow.Tests/MapArrayTests.cs
@@ -62,9 +62,9 @@ public void MapArray_Should_GetKeyValuePairs()
             var keyBuilder = builder.KeyBuilder as StringArray.Builder;
             var valueBuilder = builder.ValueBuilder as Int32Array.Builder;
 
-            KeyValuePair<string, int?> kv0 = KeyValuePair.Create("test", (int?)1);
-            KeyValuePair<string, int?> kv1 = KeyValuePair.Create("other", (int?)123);
-            KeyValuePair<string, int?> kv2 = KeyValuePair.Create("kv", (int?)null);
+            KeyValuePair<string, int?> kv0 = new KeyValuePair<string, int?>("test", (int?)1);
+            KeyValuePair<string, int?> kv1 = new KeyValuePair<string, int?>("other", (int?)123);
+            KeyValuePair<string, int?> kv2 = new KeyValuePair<string, int?>("kv", (int?)null);
 
             builder.Append();
             keyBuilder.Append("test");