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Simply curious, MSDN says that
Calling this method always throws InvalidCastException.
So why does this overload exist in the framework? Is it following some sort of pattern? I would assume for backwards compatibility it would be better to remove the overload and receive compile errors rather than run-time exceptions. I don't remember if this method was actually supported in previous frameworks though.
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ToInt32(String, IFormatProvider) Converts the specified string representation of a number to an equivalent 32-bit signed integer, using the specified culture-specific formatting information. ToInt32(String, Int32) Converts the string representation of a number in a specified base to an equivalent 32-bit signed integer.
Convert. ToInt32 allows null value, it doesn't throw any errors Int.
As you can see in the documentation in the link you provided:
Remarks
This method is reserved for future use.
They simply haven't found an implementation they are happy with or is necessary, but they are planning for it to be so.
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