Specified cast is not valid how to resolve this

Question

I have the below function  public object Convert object value         string retVal   string Empty      int oneMillion   1000000      retVal     double value   oneMillion  ToString                         return retVal       I am invoking like  var result    Convert 107284403940     Error   Specified cast is not valid    how to fix     Note   the object value can be double  decimal  float  integer 32 and 64   anything  Is it possible to do the typecasting at runtime

User · Accepted Answer

Use Convert ToDouble value  rather than  double value   It takes an object and supports all of the types you asked for      Also  your method is always returning a string in the code above  I d recommend having the method indicate so  and give it a more obvious name  public string FormatLargeNumber object value

User · Answer

If you are expecting double  decimal  float  integer why not use the one which accomodates all namely decimal  128 bits are enough for most numbers you are looking at     instead of  double value use decimal Parse value ToString    or Convert ToDecimal value

[c#] Specified cast is not valid.. how to resolve this

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