Code inspection: Dictionary item removal can be simplified with single 'Remove'

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The Remove method in Dictionary<T, T> in C# does not throw an exception if the key is not found, it simply returns false. This means you do not need to use TryGetValue to check if the key exists in the dictionary before trying to remove it.

int RemoveValue(Dictionary<int, int> d, int toRemove)
{
    if (d.TryGetValue(toRemove, out var result))
    {
        d.Remove(toRemove);
        return result;
    }
    return -1;
}

int RemoveValue(Dictionary<int, int> d, int toRemove)
{
    if (d.Remove(toRemove, out var result))
    {
        return result;
    }
    return -1;
}