void writeMarketForcesToFile()
{
string updatedMarketForces = "";
//Compile the array back to a single string
foreach (string gd in marketForces)
{
updatedMarketForces = updatedMarketForces + gd + ",";
}
//Chop off the last comma
int index = updatedMarketForces.LastIndexOf(',');
updatedMarketForces = updatedMarketForces.Substring(0, index);
//Then update the data file
dm.writeToMarketForcesFile(updatedMarketForces);
//refresh the game data array
getMarketForces();
}