C#小Tip:数字格式化显示

出处：http://www.jscode.cn/develop/v41101

using system; class program {

    static void main()     {         decimal thedecnumber = 12345.678m; //the "m" creates a literal of type decimal from a double         //using the tostring method         //the number in the format string is the precision specifier         console.writeline("no formatting: " + thedecnumber.tostring());         console.writeline("currency formatting: " + thedecnumber.tostring("c"));         console.writeline("exponential formatting: " + thedecnumber.tostring("e"));         console.writeline("fixed-point formatting: " + thedecnumber.tostring("f2"));         console.writeline("general formatting: " + thedecnumber.tostring("g"));         console.writeline("number formatting to 2 decimal places: " + thedecnumber.tostring("n2"));         console.writeline("number formatting to 3 decimal places: " + thedecnumber.tostring("n3"));         console.writeline("number formatting to 4 decimal places: " + thedecnumber.tostring("n4"));         console.writeline("percent formatting: " + thedecnumber.tostring("p0"));

        int theintnumber = 123456;         console.writeline("hexidecimal formatting (for integers): {0} = {1}", theintnumber, theintnumber.tostring("x"));

        double thedblnumber = 1234567890;         console.writeline("custom formatting: {0} to us telephone {1}", thedblnumber, thedblnumber.tostring("(###) ### - ####"));

        //keep console open if not run through command prompt         console.write("\npress enter to continue");         console.readline();     } }