Word Frequency Dictionary in C# - Example You Can Run Online

Introduction

This exercise practices keyed lookup, normalization, and collection expressions.

GetValueOrDefault provides zero for unseen words before the count is incremented.

Runnable C# example

C#

Program.cs

using System;
using System.Collections.Generic;
class Program
{
    static void Main()
    {
        var counts = new Dictionary<string, int>();
        foreach (string word in "C# is fun and C# is fast".ToLower().Split(' '))
            counts[word] = counts.GetValueOrDefault(word) + 1;
        Console.WriteLine(counts["c#"]);
    }
}

Result of running the code

Practice with the debugger

Set a breakpoint on an important assignment or condition, click Debug, and inspect the local values before stepping to the next line.

Practice with a challenge

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