om/dotnet/api/system.string" target="_blank">System<span id="LSTDA357209_1"></span><script type="text/javascript">AddLanguageSpecificTextSet("LSTDA357209_1?cs=.|vb=.|cpp=::|nu=.|fs=.");</script>String</a><br /></dd><dt><span class="parameter">format</span></dt><dd>类型：<a href="https://docs.microsoft.com/dotnet/api/system.string" target="_blank">System<span id="LSTDA357209_2"></span><script type="text/javascript">AddLanguageSpecificTextSet("LSTDA357209_2?cs=.|vb=.|cpp=::|nu=.|fs=.");</script>String</a><