in csharp/NativeUtils/VariablesMapper.cs [346:356]
public string Get(string varName)
{
string varValue;
if (variables.TryGetValue(varName, out varValue))
return varValue;
if (varName.Equals(Variables.RANDOM.ToString()))
return Random;
if (varName.Equals(Variables.TIME.ToString()))
return Time;
return Environment.GetEnvironmentVariable(varName);
}