atsvetkov/guards-simple-null-check.cs

## guards-simple-null-check.cs
void Foo(SomeReferenceType input)
{
    if (input == null)
    {
        throw new ArgumentNullException("input");
    }

    // if we made it here, input can be safely dereferenced and used
}
	void Foo(SomeReferenceType input)
	{
	if (input == null)
	{
	throw new ArgumentNullException("input");
	}

	// if we made it here, input can be safely dereferenced and used
	}