using System;

using System.Linq;

public class Program

{

    public static void Main()

    {

        var c = "server-test;database=test2";

         var keyValuePairs = c.Split(';');

             /*.Where(kvp => kvp.Contains('='))

             .Select(kvp => kvp.Split(new char[] { '=' }, 2))

             .ToDictionary(kvp => kvp[0].Trim(),

                           kvp => kvp[1].Trim(),

                           StringComparer.InvariantCultureIgnoreCase);*/

        foreach (var item in keyValuePairs) 

         {

             Console.WriteLine(item);

         }

    }

}

​