Casting a float to a double

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July 1, 2010 dananos Leave a comment Go to comments

Casting a float to a double looses precision in C#, causing bugs like this:

float x = (float)12.34;
double y = x;

What value is y?
12.34000015258789

If you really have to use floats, then this is an easy fix

double y = (double)(decimal)x;

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