摘要： 测试结果：double->none 366msdouble->long 161msdouble->long2 188msdouble->format 564msdouble->Round 393ms代码：using System;using System.Collections.Generic;using System.Diagnostics;using System.Linq;using System.Text;using System.Threading.Tasks;namespace testStringbuilder{ class Program { st 阅读全文