using System;

public class Program

{

    public static void Main()

    {

        var x = new {

            boolStringValue = "true",

            integerStringValue = "120"

        };

        var result = x.boolStringValue.TryCast<bool>();

        Console.WriteLine(result);

        var r2 = x.integerStringValue.TryCast<int>();

        Console.WriteLine(r2);

    }

}

​

public static class E {

    public static TTarget TryCast<TTarget>(this object value)

    {

      if (!(value is TTarget))

        return default(TTarget);

      return (TTarget) value;

    }   

}