Convert a given list to a dictionary with subsequent letters as keys (A, B, C, etc.).

ListToDictionary.cs

using System;
using System.Collections;
using System.Collections.Generic;
using System.Linq;

public class ListToDictionary {
    // Dictionary with subsequent letters as keys (A, B, C, etc.). Count should be less than or equal 24
    // to get reasonable results.
    public Dictionary<string, string> ToDictionary(List<string> list) {
        Dictionary<string, string> dictionary = new Dictionary<string, string>(list.Count);
        for (int i = 0; i < list.Count; i++) {
            // index used to calculate letter's position in ASCII table (A = 65, B = 66, C = 67, etc.)
            dictionary.Add(Char.ConvertFromUtf32(i + 65), list[i]);
        }
        return dictionary;
    }
}