Access info about a generic TEnum type in C#

EnumInfo.cs

using System.Runtime.CompilerServices;

/// <summary>
/// Computes various properties of <typeparamref name="TEnum"/>
/// </summary>
/// <remarks>WARNING: This assumes that <typeparamref name="TEnum"/>'s underlying type is an <see langword="int"/></remarks>
public static class EnumInfo<TEnum> where TEnum : struct, Enum
{
    private static readonly Lazy<HashSet<TEnum>> _valuesSet = new(static () => new HashSet<TEnum>(EnumValues!));

    static EnumInfo() {
        EnumValues = Enum.GetValues<TEnum>();
        EnumValuesAsInt = new int[EnumValues.Length];

        IsEmpty = EnumValues.Length == 0;

        int min = Int32.MaxValue, max = Int32.MinValue;

        for (int i = 0; i < EnumValues.Length; i++) {
            var val = EnumValues[i];
            var valAsInt = EnumValuesAsInt[i] = Unsafe.As<TEnum, int>(ref val);

            if (valAsInt < min)
                min = valAsInt;
            else if (valAsInt > max)
                max = valAsInt;
        }
    }

    // static initialization can be funky so i prefer init'ing those in the cctor
    public static bool IsEmpty { get; }
    public static int MinValue { get; }
    public static int MaxValue { get; }
    public static TEnum[] EnumValues { get; }
    public static int[] EnumValuesAsInt { get; }

    public static bool IsValid(TEnum value) => _valuesSet.Value.Contains(value);
}