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I currently have a Generic method that reads an Value from the database based on a key and returns a specific type of that value. public T Get<T>(string key, T defaultValue) { var myparms = new List<SqlParameter> { new SqlParameter("@KEY", key), }; const string getPropertyQuery = "SELECT SPARM_VALUE FROM SYSPARAMS WHERE SPARM_KEY = @KEY;"; var returnedValue = //Get value from Database if (returnedValue == null) { return defaultValue; //Value does not exists so return default. } return (T)Convert.ChangeType(returnedValue, typeof(T)); } But when I try and return a TimeSpan type I get the following exception. Invalid cast from 'System.String' to 'System.TimeSpan'. After a bit of googling I found that the most common solution is to use the TimeSpan.Parse or TimeSpan.TryParse methods. I also found TimeSpan Structure. public struct TimeSpan : IComparable, IComparable, IEquatable, IFormattable My question is why, why is TimeSpan not able to do this. Is it because it doesn't have the IConvertible interface? Any thoughts on this would be much appreciated.

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