Adding refrence to 'Xamarin.Android.Crashlytics' causes multiple compile time errors - firebase

When adding a reference through Nuget to Xamarin.Android.Crashlytics version 2.9.4.3 for my Xamarin.Android project I receive a whole host of compile time errors:
Please can anyone help with these issues? Thanks in advance:)

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Error in Xamarin Forms app.xaml with AppThemeColor

I just updated all of my nuget packages, which updated my Xamarin Forms packaged. It also updated my 'androidX packages.
I am getting the following errors:
Error: XLS0414: The type 'AppThemeColor' was not found. Verify that you are not missing an assembly reference and that all referenced assemblies have been built.
XamlC error XFC0000: Cannot resolve type "AppThemeColor".
I have update my nuget packages. I have verified that Xamarin.Forms is referenced in the net standard project. Any ideas as to what is causing this error?
TIA.
If you updated to 4.7.0, the official workaround is to downgrade to 4.6.x.
I get this error all the time now but the projects still build, so I ignore it.
I'm sure it will be fixed soon.
https://github.com/xamarin/Xamarin.Forms/issues/11101

Could not load assembly 'System.Buffers' during startup registration

My Xamarin form apps was running like 5 minutes ago then all of sudden it stop working. The apps close instantly after it started.
Below shows message display at Visual studio output,
Assembly Loader probing location: 'System.Buffers'.
Could not load assembly 'System.Buffers' during startup registration.
This might be due to an invalid debug installation.
A common cause is to 'adb install' the app directly instead of doing from the IDE.
Things that I tried but failed to resolve the problem,
Reinstall System.Buffer from Nuget package.
Clean bin and obj folder of android
Unchecked use shared runtime at Android options
Clean solution and rebuild solution
Forum that I referred
https://forums.xamarin.com/discussion/115983/stuck-on-error-could-not-load-assembly-system-buffers-during-startup-registration
https://forums.xamarin.com/discussion/63584/android-could-not-load-assembly-xxx-during-startup-registration
https://bugzilla.xamarin.com/show_bug.cgi?id=44518
Can anyone helps me? Thanks in advance
I have found the solution from one of the forum.
Uninstall System.Buffer and install System.Memory using NuGet package to your project and its done. Hope it helps you.
I have solved this issue in little bit different manner. I have installed System.Memory from NuGet package manager without uninstalling System.Buffer. Then only error is gone. If I am uninstalling System.Buffer I still face the same issue.

error in the application output while using qt creator

I have pasted the application output in the below link.please go through it and give me necessary suggestions to get my code working.
https://pastebin.com/xaFEBrDY
The program has unexpectedly finished and crashed.
the code had gtk errors which stated the use of both 2nd & 3rd version but after adding the path and libraries of gtk2 and removing gtk3 gave the above errors. can anyone help me out in knowing, what I have missed. thanks in advance

error: Failed to parse qmlimportscanner output

I have a created a fresh QML quick application using Qt 5.3.2 on Mac. When I build it has 2 link errors.
Failed to parse qmlimportscanner output.:-1: error:
[iphonesimulator-debug] Error 66
I have not even made any changes to default application, why do I get these errors and how can I fix it?
I know this question is pretty old, however, as I just encountered the same error and finally managed to solve it: Your Project Path must not contain spaces for qml quick projects on ios.
Please do not ask me how or why this is the case (as it clearly works for desktop or android deployment), but this was the issue for me. After moving the project to a different location (a folder that does not contain spaces) it would run qmake and deploy just fine.

Error in building project after installing VS2012

I have just installed VS2012 on my system and VS2010 was already installed. I have a project made in VS2010 which was build successfully but later when i have installed VS2012 then it gives an error while build. Here is the error :
Error 430 The best overloaded method match for 'System.Web.UI.HtmlControls.HtmlTableRowCollection.Add(System.Web.UI.HtmlControls.HtmlTableRow)' has some invalid arguments
I have searched on google and i found some of articles with the solution of this problem. All they have mentioned that either remove the tags or remove the runat="server" from the table tag to solve this issue. I have tried and it worked for me.
But now my main concern is that i have more than 100 such pages and i don't want to remove it from each and every page. So is there any alternative solution to solve this issue. I mean to say can we handle this error in web.config or somewhere else so that i don't need to do it for every page.
If you have any idea then kindly suggest me and your suggestions will be really appreciated. Thanks in advance.
Solution to this issue is nicely expalained in below link
http://connect.microsoft.com/VisualStudio/feedback/details/766115/value-of-type-system-web-ui-htmlcontrols-htmlgenericcontrol-cannot-be-converted-to-system-web-ui-htmlcontrols-htmltablerow
and you can apply a patch released by MS for this issue:
http://support.microsoft.com/kb/2750147

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