Better C# ArgumentNullExceptions

Evolving-ArgumentNullException.cs

// C# 5
public void MyMethod(string name)
{
    if (name == null) throw new ArgumentNullException("name", "name cannot be null.");
}

// C# 6 - nameof() to avoid magic strings
public void MyMethod(string name)
{
    if (name == null) throw new ArgumentNullException(nameof(name), $"{nameof(name)} cannot be null.");
}

// C# 7 - null coalescing operator
public void MyMethod(string name)
{
    _ = name ?? throw new ArgumentNullException(nameof(name), $"{nameof(name)} cannot be null.");
}

// C# 9 - null parameter checking
public void MyMethod(string! name) // <<< Null Parameter checking via !
{
    // runtime check still recommended, but compiler check with null parameter checking.
}

// C# 10 - simple static method
public void MyMethod(string name)
{
    ArgumentNullException.ThrowIfNull(name, nameof(name));
}