How to handle strings

I have a string that returns for example a "1" and another case where it returned a "1.2"

In the first case I handle the case base that if  mystring does not contains  (".") then I add in a ".00" to it making that "1" a "1.00"   in the second case how can I return a "1.20" if mystring is "1.2" keep in mind that I still could get strings such as "1.34" and I dont want them to turn into "1.3400" or "1.340"

Thanks
cmdolcetAsked:
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BullfrogSoftwareCommented:
'Your string is 18934.1879

Dim doubleNumber As Double
doubleNumber = Double.TryParse("18934.1879")

String formattedNumber = doubleNumber.ToString("F", CultureInfo.InvariantCulture)

'formattedNumber is now 18934.19
SteveCommented:
By using a Len(gth) statement on your result you would know how many characters you need to add.

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Jacques Bourgeois (James Burger)PresidentCommented:
Do not add zeros. Let the Format method handle the formatting for you:

CDbl(yourString).ToString("###.00###")

Add as many # as needed to cover the biggest value you expect on the integer and on the decimal portion of the number.
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