How to write a link query to get the below results

Hello Naresh,

Try below code:

public class test
{
	public string A { get; set; }
	public string B { get; set; }
	public int C { get; set; }
}

Inside some method EX: ABC()

List collection = new List();
collection.Add(new test() { A = "Naresh", B = "Suresh", C = 6 });
collection.Add(new test() { A = "Ramesh", B = "Rupesh", C = 6 });
collection.Add(new test() { A = "xyz", B = "abc", C = 10 });
collection.Add(new test() { A = "pqr", B = "asdd", C = 6 });
collection.Add(new test() { A = "asdsd", B = "rewe", C = 12 });
collection.Add(new test() { A = "wesd", B = "sfyere", C = 6 });
collection.Add(new test() { A = "sdyed", B = "hesyd", C = 12 });
collection.Add(new test() { A = "ghedg", B = "sged", C = 12 });

var result = collection.Where((item, index) =>
item.C == 6 && index < collection.Count - 1 && collection[index + 1].C == 12)
.FirstOrDefault();

if (result != null)
{
	Console.WriteLine(result.A + "\t" + result.B + "\t" + result.C);
}

Thanks

Naimish Makwana