Dictionary<T, U>: possibility to create with a case-insensitive equality comparer

[evgeny-k]

like

        // Create a new Dictionary of strings, with string keys  
        // and a case-insensitive comparer for the current culture.
        Dictionary<string, string> openWith = 
                      new Dictionary<string, string>( 
                          StringComparer.CurrentCultureIgnoreCase);

more info at https://msdn.microsoft.com/en-us/library/ms132072%28v=vs.110%29.aspx