Hello I'm wondering what is the best way to debug umbraco source code. I'm currently experiecing problem with umbraco source code, propably my database is corrupted and i'm recieving the following stack trace when i'm trying to enter Media folder or use Media Picker:

)]}', {Message: "An error has occurred.",…}
ExceptionMessage: "
↵
↵Mapping types:
↵Media -> UserProfile
↵Umbraco.Core.Models.Media -> Umbraco.Web.Models.ContentEditing.UserProfile
↵
↵Destination path:
↵ContentItemBasic`2.Owner.Owner
↵
↵Source value:
↵Umbraco.Core.Models.Media"
ExceptionType: "AutoMapper.AutoMapperMappingException"
InnerException: {Message: "An error has occurred.",…}
ExceptionMessage: "Object reference not set to an instance of an object."
ExceptionType: "System.NullReferenceException"
Message: "An error has occurred."
StackTrace: "   at Umbraco.Core.Services.UserService.GetProfileById(Int32 id)
↵   at Umbraco.Web.Models.Mapping.OwnerResolver`1.ResolveCore(TPersisted source)
↵   at AutoMapper.ValueResolver`2.Resolve(ResolutionResult source) in c:\dev\AutoMapper\src\AutoMapper\ValueResolver.cs:line 12
↵   at System.Linq.Enumerable.Aggregate[TSource,TAccumulate](IEnumerable`1 source, TAccumulate seed, Func`3 func)
↵   at AutoMapper.Mappers.TypeMapObjectMapperRegistry.PropertyMapMappingStrategy.MapPropertyValue(ResolutionContext context, IMappingEngineRunner mapper, Object mappedObject, PropertyMap propertyMap) in c:\dev\AutoMapper\src\AutoMapper\Mappers\TypeMapObjectMapperRegistry.cs:line 116"
Message: "An error has occurred."
StackTrace: "   at System.Linq.Enumerable.WhereSelectArrayIterator`2.MoveNext()
↵   at System.Collections.Generic.List`1..ctor(IEnumerable`1 collection)
↵   at System.Linq.Enumerable.ToList[TSource](IEnumerable`1 source)
↵   at Umbraco.Web.WebApi.Filters.FilterAllowedOutgoingMediaAttribute.OnActionExecuted(HttpActionExecutedContext actionExecutedContext)
↵   at System.Web.Http.Filters.ActionFilterAttribute.OnActionExecutedAsync(HttpActionExecutedContext actionExecutedContext, CancellationToken cancellationToken)
↵--- End of stack trace from previous location where exception was thrown ---
↵   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
↵   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
↵   at System.Web.Http.Filters.ActionFilterAttribute.<CallOnActionExecutedAsync>d__5.MoveNext()
↵--- End of stack trace from previous location where exception was thrown ---
↵   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
↵   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
↵   at System.Web.Http.Filters.ActionFilterAttribute.<ExecuteActionFilterAsyncCore>d__0.MoveNext()
↵--- End of stack trace from previous location where exception was thrown ---
↵   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
↵   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
↵   at System.Web.Http.Filters.ActionFilterAttribute.<CallOnActionExecutedAsync>d__5.MoveNext()
↵--- End of stack trace from previous location where exception was thrown ---
↵   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
↵   at System.Web.Http.Filters.ActionFilterAttribute.<CallOnActionExecutedAsync>d__5.MoveNext()
↵--- End of stack trace from previous location where exception was thrown ---
↵   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
↵   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
↵   at System.Web.Http.Filters.ActionFilterAttribute.<ExecuteActionFilterAsyncCore>d__0.MoveNext()
↵--- End of stack trace from previous location where exception was thrown ---
↵   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
↵   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
↵   at System.Web.Http.Filters.ActionFilterAttribute.<CallOnActionExecutedAsync>d__5.MoveNext()
↵--- End of stack trace from previous location where exception was thrown ---
↵   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
↵   at System.Web.Http.Filters.ActionFilterAttribute.<CallOnActionExecutedAsync>d__5.MoveNext()
↵--- End of stack trace from previous location where exception was thrown ---
↵   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
↵   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
↵   at System.Web.Http.Filters.ActionFilterAttribute.<ExecuteActionFilterAsyncCore>d__0.MoveNext()
↵--- End of stack trace from previous location where exception was thrown ---
↵   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
↵   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
↵   at System.Web.Http.Filters.ActionFilterAttribute.<CallOnActionExecutedAsync>d__5.MoveNext()
↵--- End of stack trace from previous location where exception was thrown ---
↵   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
↵   at System.Web.Http.Filters.ActionFilterAttribute.<CallOnActionExecutedAsync>d__5.MoveNext()
↵--- End of stack trace from previous location where exception was thrown ---
↵   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
↵   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
↵   at System.Web.Http.Filters.ActionFilterAttribute.<ExecuteActionFilterAsyncCore>d__0.MoveNext()
↵--- End of stack trace from previous location where exception was thrown ---
↵   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
↵   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
↵   at System.Web.Http.Filters.ActionFilterAttribute.<CallOnActionExecutedAsync>d__5.MoveNext()
↵--- End of stack trace from previous location where exception was thrown ---
↵   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
↵   at System.Web.Http.Filters.ActionFilterAttribute.<CallOnActionExecutedAsync>d__5.MoveNext()
↵--- End of stack trace from previous location where exception was thrown ---
↵   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
↵   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
↵   at System.Web.Http.Filters.ActionFilterAttribute.<ExecuteActionFilterAsyncCore>d__0.MoveNext()
↵--- End of stack trace from previous location where exception was thrown ---
↵   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
↵   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
↵   at System.Web.Http.Filters.ActionFilterAttribute.<CallOnActionExecutedAsync>d__5.MoveNext()
↵--- End of stack trace from previous location where exception was thrown ---
↵   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
↵   at System.Web.Http.Filters.ActionFilterAttribute.<CallOnActionExecutedAsync>d__5.MoveNext()
↵--- End of stack trace from previous location where exception was thrown ---
↵   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
↵   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
↵   at System.Web.Http.Filters.ActionFilterAttribute.<ExecuteActionFilterAsyncCore>d__0.MoveNext()
↵--- End of stack trace from previous location where exception was thrown ---
↵   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
↵   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
↵   at System.Web.Http.Filters.ActionFilterAttribute.<CallOnActionExecutedAsync>d__5.MoveNext()
↵--- End of stack trace from previous location where exception was thrown ---
↵   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
↵   at System.Web.Http.Filters.ActionFilterAttribute.<CallOnActionExecutedAsync>d__5.MoveNext()
↵--- End of stack trace from previous location where exception was thrown ---
↵   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
↵   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
↵   at System.Web.Http.Filters.ActionFilterAttribute.<ExecuteActionFilterAsyncCore>d__0.MoveNext()
↵--- End of stack trace from previous location where exception was thrown ---
↵   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
↵   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
↵   at System.Web.Http.Controllers.ActionFilterResult.<ExecuteAsync>d__2.MoveNext()
↵--- End of stack trace from previous location where exception was thrown ---
↵   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
↵   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
↵   at System.Web.Http.Filters.AuthorizationFilterAttribute.<ExecuteAuthorizationFilterAsyncCore>d__2.MoveNext()
↵--- End of stack trace from previous location where exception was thrown ---
↵   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
↵   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
↵   at System.Web.Http.Filters.AuthorizationFilterAttribute.<ExecuteAuthorizationFilterAsyncCore>d__2.MoveNext()
↵--- End of stack trace from previous location where exception was thrown ---
↵   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
↵   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
↵   at System.Web.Http.Filters.AuthorizationFilterAttribute.<ExecuteAuthorizationFilterAsyncCore>d__2.MoveNext()
↵--- End of stack trace from previous location where exception was thrown ---
↵   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
↵   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
↵   at System.Web.Http.Filters.AuthorizationFilterAttribute.<ExecuteAuthorizationFilterAsyncCore>d__2.MoveNext()
↵--- End of stack trace from previous location where exception was thrown ---
↵   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
↵   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
↵   at System.Web.Http.Controllers.ExceptionFilterResult.<ExecuteAsync>d__0.MoveNext()
↵--- End of stack trace from previous location where exception was thrown ---
↵   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
↵   at System.Web.Http.Controllers.ExceptionFilterResult.<ExecuteAsync>d__0.MoveNext()
↵--- End of stack trace from previous location where exception was thrown ---
↵   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
↵   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
↵   at System.Web.Http.Dispatcher.HttpControllerDispatcher.<SendAsync>d__1.MoveNext()"