Working with List collection ToDictionary method

ToDictionary is a mthod available in List collection which converts any List collection into a Dictionary collection.

For Example:

List<string> lst_names = new List<string>()
{
    "Rajesh",
    "Bhuvan",
    "Prakash",
    "Reema"
};

var names = lst_names.ToDictionary(g => g, g => true);

if (names.ContainsKey("Rajesh"))
{
    Response.Write("Rajesh is present in a list collection");
}

Output: Rajesh is present in a list collection