Server Error in '/' Application.

An item with the same key has already been added.

Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.

Exception Details: System.ArgumentException: An item with the same key has already been added.

Source Error:

An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below.

Stack Trace:


[ArgumentException: An item with the same key has already been added.]
   System.ThrowHelper.ThrowArgumentException(ExceptionResource resource) +60
   System.Collections.Generic.Dictionary`2.Insert(TKey key, TValue value, Boolean add) +441
   tshirtpros.com.Helpers.<>c__DisplayClass12_0.<GetAvailableSizes>b__0(ColorPrice q) +95
   System.Collections.Generic.List`1.ForEach(Action`1 action) +101
   tshirtpros.com.Helpers.CommonHelper.GetAvailableSizes(List`1 availSizes) +128
   tshirtpros.com.Controllers.QuoteController.GetGarmentView(ManagerKind kind) +7866
   tshirtpros.com.Controllers.QuoteController.Embroidery(Nullable`1 stepId, Nullable`1 typeId, Nullable`1 styleId, String mbl, Nullable`1 colorId) +2989
   lambda_method(Closure , ControllerBase , Object[] ) +395
   System.Web.Mvc.ReflectedActionDescriptor.Execute(ControllerContext controllerContext, IDictionary`2 parameters) +267
   System.Web.Mvc.ControllerActionInvoker.InvokeActionMethod(ControllerContext controllerContext, ActionDescriptor actionDescriptor, IDictionary`2 parameters) +35
   System.Web.Mvc.<>c__DisplayClass15.<InvokeActionMethodWithFilters>b__12() +79
   System.Web.Mvc.ControllerActionInvoker.InvokeActionMethodFilter(IActionFilter filter, ActionExecutingContext preContext, Func`1 continuation) +453
   System.Web.Mvc.ControllerActionInvoker.InvokeActionMethodFilter(IActionFilter filter, ActionExecutingContext preContext, Func`1 continuation) +453
   System.Web.Mvc.ControllerActionInvoker.InvokeAction(ControllerContext controllerContext, String actionName) +632
   System.Web.Mvc.Controller.ExecuteCore() +144
   System.Web.Mvc.ControllerBase.Execute(RequestContext requestContext) +93
   System.Web.Mvc.<>c__DisplayClassb.<BeginProcessRequest>b__5() +57
   System.Web.Mvc.Async.<>c__DisplayClass1.<MakeVoidDelegate>b__0() +25
   System.Web.Mvc.<>c__DisplayClasse.<EndProcessRequest>b__d() +54
   System.Web.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +431
   System.Web.HttpApplication.ExecuteStepImpl(IExecutionStep step) +75
   System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +158


Version Information: Microsoft .NET Framework Version:4.0.30319; ASP.NET Version:4.8.4110.0