What is the linq equivalent to the SQL IN operator

Question

With linq I have to check if a value of a row is present in an array.
The equivalent of the sql query:

WHERE ID IN (2,3,4,5)

How can I

Answer 1

Following is a generic extension method that can be used to search a value within a list of values:

    public static bool In(this T searchValue, params T[] valuesToSearch)
    {
        if (valuesToSearch == null)
            return false;
        for (int i = 0; i < valuesToSearch.Length; i++)
            if (searchValue.Equals(valuesToSearch[i]))
                return true;

        return false;
    }

This can be used as:

int i = 5;
i.In(45, 44, 5, 234); // Returns true

string s = "test";
s.In("aa", "b", "c"); // Returns false

This is handy in conditional statements.