ClockHourToDegree.cs

void Main()
{
  XunitRunner.Run(Assembly.GetExecutingAssembly());
}

// Define other methods and classes here

public class Class1
{
  [Theory]
  [MemberData("TestData", MemberType = typeof(Class1))]
  public void HourToAngleStrategy1(int hour, int expectedAngle)
  {
    Assert.Equal(HourToAngle(hour), expectedAngle);
  }

  [Theory]
  [MemberData("TestData", MemberType = typeof(Class1))]
  public void HourToAngleStrategy2(int hour, int expectedAngle)
  {
    Assert.Equal(HourToAngle2(hour), expectedAngle);  
  }

  public static IEnumerable<object[]> TestData
  {
    get
    {
      yield return new object[] { 12, 90 };
      yield return new object[] { 1, 60 };
      yield return new object[] { 2, 30 };
      yield return new object[] { 3, 0 };
      yield return new object[] { 4, 330 };
      yield return new object[] { 5, 300 };
      yield return new object[] { 6, 270 };
      yield return new object[] { 7, 240 };
      yield return new object[] { 8, 210 };
      yield return new object[] { 9, 180 };
      yield return new object[] { 10, 150 };
      yield return new object[] { 11, 120 };
    }
  }

  int HourToAngle(int hour)
  {
    int angle = 0;
    if (hour <= 3) 
      angle = ((3 - hour) * 30);
    else
      angle = ((12 - hour) * 30) + 90;
    return angle;
  }
  
  int HourToAngle2(int hour)
  {
    float angle = ((15 - hour) / 12f);
    float quotient = (int)angle;
    float minutes = angle - quotient;
    return (int)Math.Round(minutes * 360f, 0);
  }
}