namespace System
{
    public readonly struct Single : IAdditionOperators<float, float, float>, IAdditiveIdentity<float, float>, IBinaryFloatingPoint<float>, IBinaryNumber<float>, IBitwiseOperators<float, float, float>, IComparable, IComparable<float>, IComparisonOperators<float, float>, IConvertible, IDecrementOperators<float>, IDivisionOperators<float, float, float>, IEqualityOperators<float, float>, IEquatable<float>, IFloatingPoint<float>, IFormattable, IIncrementOperators<float>, IMinMaxValue<float>, IModulusOperators<float, float, float>, IMultiplicativeIdentity<float, float>, IMultiplyOperators<float, float, float>, INumber<float>, IParseable<float>, ISignedNumber<float>, ISpanFormattable, ISpanParseable<float>, ISubtractionOperators<float, float, float>, IUnaryNegationOperators<float, float>, IUnaryPlusOperators<float, float>
    {
        public static bool IsNegative(float f);
    }
}