round up to 50 or 100 in C#

Question

I want to know how can I allow the user to select if he want to round up to 50 or 100 or 150 or 150, etc..

For example...

• if the total amount was 0.030 and user decided to round up to 50 then it should be 0.050
• if the total amount was 0.030 and user decided to round up to 100 then it should be 0.100
• if the total amount was 0.030 and user decided to round up to 150 then it should be 0.150
• if the total amount was 0.030 and user decided to round up to 200 then it should be 0.200

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Jassim Rahma

Answer 1

Something like this should work:

public static decimal RoundUp(decimal value, int rounding)
{
    decimal factor = 1000M / rounding;

    return Math.Ceiling(factor * value) * 1M / factor;
}

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