Filter Dictionnary<string,string> that do not have their keys in an array string[] [duplicate]

Question

I have the following objects:

IDictionary<string, string> foo = new Dictionary<string, string>() {
    { "key1", "somerandomvalue" },
    { "key2", "somerandomvalue" },
    { "key3", "somerandomvalue" },
    { "key4", "somerandomvalue" }
}

public static readonly string[] bar = {
    "key1",
    "key3"
}; 

I would like to filter the Dictionary foo and keep the item that have their keys in the Array bar. So we'll have something like that:

bar: {
    { "key1", "somerandomvalue" },
    { "key3", "somerandomvalue" }
}

I have tried the following but dont understand why the k variable is flagged as char type

foo
    .Where(k => x.Key.Any(x => bar.Contains(x.ToString())))
    .ToDictionary(k => k.Key, v => v.Value);

Answer 1

You use need to use Any in Where function by your key collection bar.

foo.Where(x=> bar.Any(b => b == x.Key)).ToDictionary(k => k.Key, v => v.Value);