SplitIntoParts

public static class StringExtensions
{
    public static List<string> SplitIntoParts(this string input, int partLength)
    {
        var result = new List<string>();
        int partIndex = 0;
        int length = input.Length;
        while (length > 0)
        {
            var tempPartLength = length >= partLength ? partLength : length;
            var part = input.Substring(partIndex * partLength, tempPartLength);
            result.Add(part);
            partIndex++;
            length -= partLength;
        }
        return result;
    }
}

string longString = "This is a very long string, which we want to split on smaller parts every max. 30 characters long."; // Length: 98

var partLength = 30;
var parts = longString.SplitIntoParts(partLength);
Console.WriteLine("String: " + longString);
Console.WriteLine("Total length: " + longString.Length);
Console.WriteLine("Part length: " + partLength);
Console.WriteLine("Total parts: " + parts.Count);
Console.WriteLine("Parts:");
foreach (var part in parts)
{
    Console.WriteLine("{0}: {1}", part.Length.ToString("D3"), part);
}
Console.ReadLine();


// OUTPUT:
// String: This is a very long string, which we want to split on smaller parts every max. 30 characters long.
// Total length: 98
// Part length: 30
// Total parts: 4
// Parts:
// 030: This is a very long string, wh
// 030: ich we want to split on smalle
// 030: r parts every max. 30 characte
// 008: rs long.