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            class Command { public virtual void Execute() { } } class InvalidOperationException<T> : InvalidOperationException where T : Command { public InvalidOperationException(string message) : base(message) { } // some specific information about // the command type T that threw this exception } static class CommandExtensions { public static void ThrowInvalidOperationException<TCommand>( this TCommand command, string message) where TCommand : Command { throw new InvalidOperationException<TCommand>(message); } } class CopyCommand : Command { public override void Execute() { // after something went wrong: this.ThrowInvalidOperationException("Something went wrong"); } } class CutCommand : Command { public override void Execute() { // after something went wrong: this.ThrowInvalidOperationException("Something else went wrong"); } }