Question

Why does

Convert.ToBoolean("1") 

throw a System.FormatException?

How should I proceed with this conversion?

Answer 1

Yes, this is as documented:

[throws] FormatException [if] value is not equal to TrueString or FalseString.

TrueString is “True” and FalseString is “False”.

If you want to detect whether a string is “1” or not, use this code:

bool foo = text == "1";