/// <summary>
/// 初始化类<see cref="IndentedStringBuilder"/>。
/// </summary>
/// <param name="from">从当前实例再进行缩进。</param>
public IndentedStringBuilder(IndentedStringBuilder from)
{
_indent = from._indent;
}
public Indenter(IndentedStringBuilder stringBuilder)
{
_stringBuilder = stringBuilder;
_stringBuilder.IncrementIndent();
}