public static void Main()
string cdsOrgUri = "https://someinstance.crm.dynamics.com/CITTest";
string relativePathToOdata = "/api/data/v9.1/";
Uri uri = new Uri(new Uri(cdsOrgUri), relativePathToOdata);
Console.WriteLine("^ Notice that it chops off the 'CITTest' from the original OrgUri");