Creates SqlException through reflection and sets ErrorMessage and ErrorCode. Be aware this reflects private functionality which is likely to change, do not use this in production code

SqlExceptionCreator

public static class SqlExceptionCreator
{
	public static SqlException Create(string message, int errorCode)
	{
		SqlException exception = Instantiate<SqlException>();
		SetProperty(exception, "_message", message);

		var errors = new ArrayList();

		var errorCollection = Instantiate<SqlErrorCollection>();
		SetProperty(errorCollection, "errors", errors);

		var error = Instantiate<SqlError>();
		SetProperty(error, "number", errorCode);
		errors.Add(error);

		SetProperty(exception, "_errors", errorCollection);

		return exception;
	}

	private static T Instantiate<T>() where T : class
	{
		return FormatterServices.GetUninitializedObject(typeof(T)) as T;
	}

	private static void SetProperty<T>(T targetObject, string fieldName, object value)
	{
		var field = typeof(T).GetField(fieldName, BindingFlags.NonPublic | BindingFlags.Instance);
		if (field != null)
		{
			field.SetValue(targetObject, value);
		}
		else
		{
			throw new InvalidOperationException("No field with name " + fieldName);
		}
	}
}