c# - Type Data From InvalidCastException -

the question pretty simple: there way problematic system.types invalidcastexception? want able display information failed type casting in format such "expected {to-type}; found {from-type}", cannot find way access types involved.

edit: reason need able access types involved because have information shorter names times. example, instead of type rfsmallint, want type smallint. instead of error message

unable cast object of type 'refactor.rfsmallint' type 'refactor.rfbigint'. 

i want display

expected bigint; recieved smallint. 

one solution implement cast function gives information if cast doesn't succeed:

static void main(string[] args) {     try     {         string = cast<string>(1);     }     catch (invalidcastexceptionex ex)     {         console.writeline("failed convert {0} {1}.", ex.fromtype, ex.totype);     } }    public class invalidcastexceptionex : invalidcastexception {     public type fromtype { get; private set; }     public type totype { get; private set; }      public invalidcastexceptionex(type fromtype, type totype)     {         fromtype = fromtype;         totype = totype;     } }  static totype cast<totype>(object value) {     try     {         return (totype)value;     }     catch (invalidcastexception)     {         throw new invalidcastexceptionex(value.gettype(), typeof(totype));     } }