Find the intersection of two lists in linq?

I have list of int A,B. i like to do the following step in linq

list<int> c = new List<int>();

for (int i = 0; i < a.count; i++)
{
    for (int j = 0; j < b.count; j++)
    {
        if (a[i] == b[j])
        {
            c.add(a[i]);
        }
    }
}

if its a and b is object , I need check particular properties like this manner and add list if it equals how can i do this in linq?

Solution 1:

You could use the Intersect method:

var c = a.Intersect(b);

This return all values both in a and b. However, position of the item in the list isn't taken into account.

Solution 2:

You can use Intersect:

var a = new List<int>();
var b = new List<int>();

var c = a.Intersect(b);

Solution 3:

Produce a list c containing all elements that are present in both lists a and b:

List<int> c = a.Intersect(b).ToList();