How should test cases using MSTest look like in C #?

[Oba22]

Explain, please, with an example, what test cases are on the example of MS Test unit tests.

The story begins with the fact that I received this remark: When testing, you should use test cases
An example of how the tests look now (I do not insert testable methods by a specialist):

[DataTestMethod, Description("Testing the properties of the vector lengths. Positive test result.")]
[DynamicData(nameof(GetVectorsWithPositiveNumbersForLengthTest), DynamicDataSourceType.Method)]
public void LengthProperty_OneVector_PositiveTestResult(Vector vector, double expectedLength)
{
    Assert.AreEqual(expectedLength, vector.Length);
}

private static IEnumerable<object[]> GetVectorsWithPositiveNumbersForLengthTest()
{
    yield return new object[] { new Vector(5, 1, 4), 22 };
    yield return new object[] { new Vector(10, 20, 30), 1310 };
    yield return new object[] { new Vector(6, 12, 9), 231 };
}

What will the following example look like if tested through test cases? Thanks!

[rotator]

MSTest uses the DataRow attribute to define test cases.
Parameters are passed in it.
A complex type - Vector in this case - is created inside a test method.

[DataTestMethod]
[DataRow(5, 1, 4, 22)]
[DataRow(10, 20, 30, 1310)]
[DataRow(6, 12, 9, 231)]
public void LengthProperty_OneVector_PositiveTestResult(double x, double y, double z, double expectedLength)
{
    var vector = new Vector(x, y, z);

    Assert.AreEqual(expectedLength, vector.Length);
}