title: Round a decimal to the nearest quarter in C#
body: <p>Is there a simple way in c# to round a decimal to the nearest quarter i.e. x.0, x.25, x.50 x.75
  for example 0.21 would round to 0.25, 5.03 would round to 5.0</p>
  
  <p>Thanks in advance for any help.</p>