guards-expressions-notnull.cs

public static class Guard
{
    public static void NotNull<T>(Expression<Func<T>> expression) where T : class
    {
        var value = /* somehow compile the expression and invoke the delegate to produce a value */;
        if (value == null)
        {
            throw new ArgumentNullException(GetParameterName(expression));
        }
    }
    
    private static string GetParameterName(Expression reference)
    {
        var lambda = reference as LambdaExpression;
        var member = lambda.Body as MemberExpression;

        return member.Member.Name;
    }
}