Dictionary Search with Linq

Question

we can search for a dictionary, for example

var dictionary = new Dictionary<string,string>(); dictionary.Keys.Where( key => key.Contains("a")).ToList(); 

but it returns a list. I want linq to return true or false. so that will be the correct code to search for a dictionary with linq. please guide.

Answer 1

Use the Any() operator:

 dictionary.Keys.Where(key => key.Contains("a")).Any(); 

or

 dictionary.Keys.Any(key => key.Contains("a")); 

Answer 2

Use Any instead of Where :

 dictionary.Keys.Any( key => key.Contains("a")); 

Answer 3

You can use the .Any () keyword:

 bool exists = dictionary.Keys.Any(key => key.Contains("a")); 

Answer 4

If you ask if you can determine if any key contains a in the dictionary, you can do:

 dictionary.Keys.Any(key => key.Contains("a"))