use GetValuesAsUnderlyingType from polyfill (#4987)

SimonCropp · web-flow · commit fa2aed7331f1 · 2026-02-25T18:30:48.000Z
diff --git a/TUnit.Core/Attributes/TestData/MatrixDataSourceAttribute.cs b/TUnit.Core/Attributes/TestData/MatrixDataSourceAttribute.cs
@@ -206,12 +206,8 @@ private bool IsExcluded(object?[] exclusion, object?[] rowArray)
 
         if (resolvedType.IsEnum)
         {
-#if NET5_0_OR_GREATER
             var enumValues = Enum.GetValuesAsUnderlyingType(resolvedType)
                                  .Cast<object?>();
-#else
-            var enumValues = Enum.GetValues(resolvedType).Cast<object?>();
-#endif
 
             if (isNullable)
             {

Original file line number	Diff line number	Diff line change
`@@ -206,12 +206,8 @@ private bool IsExcluded(object?[] exclusion, object?[] rowArray)`
`206`	`206`
`207`	`207`	`if (resolvedType.IsEnum)`
`208`	`208`	`{`
`209`		`-#if NET5_0_OR_GREATER`
`210`	`209`	`var enumValues = Enum.GetValuesAsUnderlyingType(resolvedType)`
`211`	`210`	`.Cast<object?>();`
`212`		`-#else`
`213`		`- var enumValues = Enum.GetValues(resolvedType).Cast<object?>();`
`214`		`-#endif`
`215`	`211`
`216`	`212`	`if (isNullable)`
`217`	`213`	`{`