if(obj == null)
   throw new ArgumentNullException()

public class Validatable<T>
{
    public T Value { get; }
    public Validatable(ref T argument)
    {
        Value = argument;
    }
}


public static Validatable<T> ThrowIf<T>(this T argument)
{
    return new Validatable<T>(ref argument);
}

public static Validatable<T> IsNull<T>(this Validatable<T> argument) where T : class
{
    if (argument.Value == null)
        throw new ArgumentNullException();
    return argument;
}

public static Validatable<T> CollectionEmpty<T>(this Validatable<T> argument) where T: ICollection
{
    if (argument.Value.Count == 0)
        throw new ArgumentException();
    return argument;
}

List<int> testList = new List<int>() { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 };
testList.ThrowIf().IsNull().CollectionEmpty();

int iNumber = 1000000000;
Stopwatch sw1 = new Stopwatch();
Stopwatch sw2 = new Stopwatch();
sw1.Start();
for (int i = 0; i < iNumber; ++i)
{
    if (testList == null)
        throw new ArgumentNullException();
    if (testList.Count == 0)
        throw new ArgumentException();
}
sw1.Stop();
sw2.Start();
for (int i = 0; i < iNumber; ++i)
{
    testList.ThrowIf().IsNull().CollectionEmpty();
}
sw2.Stop();

Console.WriteLine($"sw1: {sw1.ElapsedTicks} ticks");
Console.WriteLine($"sw2: {sw2.ElapsedTicks} ticks");

public static void IsNullLite<T>(this T argument)
{
    if (argument == null)
        throw new ArgumentException();
}

public static void CollectionEmpty2Lite<T>(this T argument) where T : ICollection
{
    if (argument.Count == 0)
        throw new ArgumentException();
}