Q:

Create new list from a old list using a lambda function

I have the following: List<InputRow> which contains a number of InputRow objects.   
I am wondering if there is a way for me to use a lambda function on my original list to give me a new List where InputRow.someProperty > 1 for all the objects.  
This would leave me with a list of InputRow objects all having someProperty greater than 1. 

A:

You can of course also do this:
var list = new List<string>(){ "a", "b", "c" };

list. RemoveAll(s => s == "b");

which removes the items in place instead of creating a new list. 

A:

You could use LINQ (a conjunction of the .Where() and .ToList() extension methods):
List<InputRow> originalList = ...
List<InputRow> filteredList = originalList
    .Where(x => x.someProperty > 1)
    .ToList();

A:

Sure.  You can do this:
var newList = inputRowList. Where(inputRow => inputRow.someProperty > 1).ToList();

