rounding up

i need to round up a double to the nearest 0.5
for eg if the value is 5.36 it should be rounded to 5.5
if the value is 3.12 it should be rounded to 3.0
output should be a multiple of 0.5
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i have a solution but donno if there is a better solution???
multiply the number by 2, round it using Math.Round(), then divide it by 2
 
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