AsSpan() [3/3]

static ReadOnlySpan< char > System.MemoryExtensions.AsSpan ( this string? text, int start, int length )

inlinestatic

Definition at line 395 of file MemoryExtensions.cs.

    {
        if (text == null)
        {
            if (start != 0 || length != 0)
            {
                ThrowHelper.ThrowArgumentOutOfRangeException(ExceptionArgument.start);
            }
            return default(ReadOnlySpan<char>);
        }
        if ((ulong)((long)(uint)start + (long)(uint)length) > (ulong)(uint)text.Length)
        {
            ThrowHelper.ThrowArgumentOutOfRangeException(ExceptionArgument.start);
        }
        return new ReadOnlySpan<char>(ref Unsafe.Add(ref text.GetRawStringData(), (nint)(uint)start), length);
    }

References System.length, System.start, System.text, and System.ThrowHelper.ThrowArgumentOutOfRangeException().