/// <summary>
/// Checks if the value given for <paramref name="length"/> isn't a negative number.
/// </summary>
/// <param name="length">Integer to be verified that it isn't less than zero.</param>
internal static void CheckLengthIsPositive(int length)
{
if (length < 0)
{
ExceptionThrower.Throw_Length_ArgumentOutOfRangeException(length, nameof(length));
}
}
/// <summary>
/// Checks if the value given for <paramref name="length"/> isn't bigger than the given <paramref name="stringLength"/>.
/// </summary>
/// <param name="stringLength">The amount of available characters from which the user wishes to select <paramref name="length"/> amount.</param>
/// <param name="length">Amount of characters the user wishes to select from a string with length "<paramref name="stringLength"/>".</param>
internal static void CheckLengthIsWithinBounds(int stringLength, int length)
{
int lengthDiff = stringLength - length;
if (lengthDiff < 0)
{
ExceptionThrower.Throw_Length_ArgumentOutOfRangeException(length, nameof(length), lengthDiff);
}
}