Sorting a list based on string case

How can I sort a List by order of case e.g.

• smtp:user@domain.com
• smtp:user@otherdomain.com
• SMTP:user@anotherdomain.com

I would like to sort so that the upper case record is first in the list e.g SMTP:user@anotherdomain.com.

From stackoverflow

• Most language libraries have a built in sort function with a way to specify the compare function. You can customize the compare function to sort based on any criteria you want.

  In your case the default sort function will probably work.

• you need to create a custom comparer class that implements IComparer

• You can use StringComparer.Ordinal to get a case sensitive sorting:

          List<string> l = new List<string>();
          l.Add("smtp:a");
          l.Add("smtp:c");
          l.Add("SMTP:b");
  
          l.Sort(StringComparer.Ordinal);
  

• Hi all,

  I was writing another example while t4rzsan has answered =) I prefer t4rzsan´s answer... anyway, this is the answer I was writing.

  //Like ob says, you could create your custom string comparer
  public class MyStringComparer : IComparer<string>
  {
      public int Compare(string x, string y)
      {
          // Return -1 if string x should be before string y
          // Return  1 if string x should be after string y
          // Return  0 if string x is the same string as y
      }
  }
  

  Example of using your own string comparer:

  public class Program
  {
      static void Main(string[] args)
      {
          List<string> MyList = new List<string>();
  
          MyList.Add("smtp:user@domain.com");
          MyList.Add("smtp:user@otherdomain.com");
          MyList.Add("SMTP:user@anotherdomain.com");
  
          MyList.Sort(new MyStringComparer());
  
          foreach (string s in MyList)
          {
              Console.WriteLine(s);
          }
  
          Console.ReadLine();
      }
  }