Using a LINQ query instead of a foreach loop

Question

I want to convert this this piece of code to a LINQ query as LINQ is much quicker than a foreach. I dont know how to go about doing it, can do basically simple LINQ queries.

What i am trying to do is get a specific field in the dictionary.

Dictionary<string, object> fieldLayout = null;
foreach (Dictionary<string, object> dic in pageLayout)
{
    if (dic[ "FIELD" ].ToString() == "123")
    {
        fieldLayout = dic;
        break;
    }
}

Answer 1

fieldLayout = pageLayout.FirstOrDefault(dic => dic["FIELD"].ToString() == "213");

Answer 2

LINQ几乎不比foreach快，但这超出了这里的范围。

var fieldLayout = pageLayout.FirstOrDefault(pl => pl["FIELD"].ToString() == "123");

Answer 3

Firstly, LINQ is not faster than a foreach loop.

Here is the implementation:

Dictionary<string, object> fieldLayout = pageLayout.Where(x => x["FIELD"].ToString() == "123").FirstOrDefault();

Or even better:

Dictionary<string, object> fieldLayout = pageLayout.FirstOrDefault(x => x["FIELD"].ToString() == "123");