unable cast string to object

[mehliaeb]

DesiredCapabilities capabilities = DesiredCapabilities.Chrome();
ChromeOptions options = new ChromeOptions();
options.AddArguments("test-type");
options.BinaryLocation = @"C:\Users\ebrahimpour.l\Documents\Visual Studio 2015\Projects\FirstPackage\FirstPackage\bin\Debug\ chro‌​medriver.exe";

capabilities.SetCapability("chrome.binary", @"C:\Users\ebrahimpour.l\Documents\Visual Studio 2015\Projects\FirstPackage\FirstPackage\bin\Debug\ chro‌​medriver.exe");
capabilities.SetCapability(ChromeOptions.Capabilit y, options);

System.Environment.SetEnvironmentVariable("webdriver.chrome.‌​driver", @"C:\Users\ebrahimpour.l\Documents\Visual Studio 2015\Projects\FirstPackage\FirstPackage\bin\Debug\ chro‌​medriver.exe");

driver = new ChromeDriver(@"C:\Users\ebrahimpour.l\Documents\Visual Studio 2015\Projects\FirstPackage\FirstPackage\bin\Debug");

capabilities.SetCapability( capabilities.Platform.ProtocolPlatformType, "WebDriver");
capabilities.SetCapability( CapabilityType.BrowserName, "chrome");
capabilities.SetCapability( capabilities.Version, "57");
capabilities.SetCapability( CapabilityType.Platform, "WinNT");
capabilities.SetCapability( ChromeOptions.Capability, options);

RemoteWebDriver rw = new RemoteWebDriver(new Uri("http://localhost:4444/grid/console"), capabilities);
driver = rw;
baseURL = "http://192.168.10.173:8080/";
verificationErrors = new StringBuilder();


error:
it is what resharper give me about error "OneTimeSetUp: System.InvalidCastException : Unable to cast object of type 'System.String' to type 'System.Collections.Generic.Dictionary`2[System.String,Syste‌​m.Object]'. Exception doesn't have a stacktrace "