title: string confused with a date. ToDouble issue in C#
body: <p>i have a simple conversion in C# from string ToDouble as shown in the image.
  The exception thrown speaks of a datetime conversion, but neither the string resembles a date, not the variable assigned to is a DateTime variable. Can somebody help?</p>
  
  <p>Thank you.</p>
  
  <p><img src="https://i.stack.imgur.com/YXRdQ.jpg" alt="enter image description here"></p>