You should handle the event of Key_Pressed and check e.KeyChar, if that's equal to ".", please set e.Handled=false, otherwises set to true. If you think one reply solves your problem, please mark it as An Answer, if you think someone's reply helps you, please mark it as a Pro...
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Cost Of Living Calculator Cost Of Living Index (2018) Where Our Money Goes Currency Conversion (Universal) Using Live, Up-To-The-Minute Currency Rates For Over 180 Different Currencies (xe.com/ucc) Dinkytown.net: Financial Calculators: Investment, Retirement, Insurance, Auto, Mortgage, Loans, ...
publicclassCalculatorService:ICalculatorService{publicdoubleAdd_Calc(double val_1,double val_2){return(val_1+val_2);}publicdoubleDivide_Calc(double val_1,double val_2){if(val_2==0){thrownewDivideByZeroException("val_2 not be zero");}return(val_1/val_2);}publicdoubleMultiply_Calc(double...