/// Returns a new DateTime that adds the specified number of microseconds to the value of this instance.
/// </summary>
/// <param name="dateTime">The DateTime to add microseconds to.</param>
/// <param name="value">A number of whole and fractional microseconds. The value parameter can be negative or positive. Note that this value is rounded to the nearest integer.</param>
/// <returns>An object whose value is the sum of the date and time represented by this instance and the number of microseconds represented by value.</returns>