 href="https://docs.microsoft.com/dotnet/api/system.string" target="_blank">System<span id="LST10D2A343_2"></span><script type="text/javascript">AddLanguageSpecificTextSet("LST10D2A343_2?cs=.|vb=.|cpp=::|nu=.|fs=.");</script>String</a><br />对 TotalMilliseconds 结果进行 ToString([format]) 中的参数</dd></dl><h4 class="subHeading">返回值</h4>类型：<a href="https://docs.microsoft.com/dotnet/api/system.string" target="_blank">String</a><br /></div><div class="collapsibleAreaRegion" id="seeAlsoSec