Implicit type example

LatLong.cs

using System;

namespace Foo.Bar.Baz
{
    /// <summary>
    ///     Allows us to define actual LatLong in our models and have all platforms handle them whether
    ///     they use float, decimal, or double as their underlying types.
    /// </summary>
    /// <remarks>Our "opinion" is that at the end of the day, a <see cref="LatLong"/> is simply a <see cref="Double"/></remarks>
    public struct LatLong
    {
        public LatLong(double value)
        {
            _value = value;
        }

        private readonly double _value;

        /// <summary>
        /// Allows direct casting from a LatLong to a Double
        /// </summary>
        /// <param name="value"><see cref="LatLong"/> to be cast</param>
        /// <returns><see cref="Double"/></returns>
        public static implicit operator double(LatLong value)
        {
            double result;
            if (double.TryParse(value.ToString(), out result))
            {
                return result;
            }
            var msg = string.Format("Cannot cast LatLong value: {0} to double.", value);
            throw new InvalidCastException(msg);
        }

        /// <summary>
        /// Allows direct casting from a Double to a LatLong
        /// </summary>
        /// <param name="value"><see cref="Double"/> to be cast</param>
        /// <returns><see cref="LatLong"/></returns>
        public static implicit operator LatLong(double value)
        {
            return new LatLong(value);
        }

        /// <summary>
        /// Allows direct casting from a Decimal to a LatLong
        /// </summary>
        /// <param name="value"><see cref="Decimal"/> to be cast</param>
        /// <returns><see cref="LatLong"/></returns>
        public static implicit operator LatLong(decimal value)
        {
            return new LatLong(Convert.ToDouble(value));
        }

        /// <summary>
        /// Allows direct casting from a Float to a LatLong
        /// </summary>
        /// <param name="value"><see cref="Single"/> to be cast</param>
        /// <returns><see cref="LatLong"/></returns>
        public static implicit operator LatLong(float value)
        {
            return new LatLong(Convert.ToDouble(value));
        }

        public override string ToString()
        {
            return _value.ToString();
        }
    }
}