string inputStr=" xx xx ";inputStr=Regex.Replace(inputStr.Trim()," "," ");Regex.Replace是什么意思,后面的“”和"

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string inputStr=" xx xx ";inputStr=Regex.Replace(inputStr.Trim()," *"," ");Regex.Replace是什么意思,后面的“*”和"
string inputStr=" xx xx ";
inputStr=Regex.Replace(inputStr.Trim()," *"," ");
Regex.Replace是什么意思,后面的“*”和"

string inputStr=" xx xx ";inputStr=Regex.Replace(inputStr.Trim()," *"," ");Regex.Replace是什么意思,后面的“*”和"
Regex正则表达式Replace取代