Concat< T >()

static string System.String.Concat< T > ( IEnumerable< T > values )

inlinestatic

Definition at line 1631 of file String.cs.

    {
        if (values == null)
        {
            throw new ArgumentNullException("values");
        }
        if (typeof(T) == typeof(char))
        {
            using (IEnumerator<char> enumerator = Unsafe.As<IEnumerable<char>>(values).GetEnumerator())
            {
                if (!enumerator.MoveNext())
                {
                    return Empty;
                }
                char current = enumerator.Current;
                if (!enumerator.MoveNext())
                {
                    return CreateFromChar(current);
                }
                Span<char> initialBuffer = stackalloc char[256];
                ValueStringBuilder valueStringBuilder = new ValueStringBuilder(initialBuffer);
                valueStringBuilder.Append(current);
                do
                {
                    current = enumerator.Current;
                    valueStringBuilder.Append(current);
                }
                while (enumerator.MoveNext());
                return valueStringBuilder.ToString();
            }
        }
        using IEnumerator<T> enumerator2 = values.GetEnumerator();
        if (!enumerator2.MoveNext())
        {
            return Empty;
        }
        string text = enumerator2.Current?.ToString();
        if (!enumerator2.MoveNext())
        {
            return text ?? Empty;
        }
        Span<char> initialBuffer = stackalloc char[256];
        ValueStringBuilder valueStringBuilder2 = new ValueStringBuilder(initialBuffer);
        valueStringBuilder2.Append(text);
        do
        {
            T current2 = enumerator2.Current;
            if (current2 != null)
            {
                valueStringBuilder2.Append(current2.ToString());
            }
        }
        while (enumerator2.MoveNext());
        return valueStringBuilder2.ToString();
    }

References System.String.CreateFromChar(), System.String.Empty, System.Collections.Generic.Dictionary< TKey, TValue >.GetEnumerator(), System.String.GetEnumerator(), System.text, and System.values.