error MSB3323: Unable to find manifest signing certificate in the certificate store

Follow the following steps to solve this problem :
Right click on your project in visual studio, then choose properties as shown below :

Then open signing tab, from this we can choose three different steps, but in this post I'm choosing step number three, namely for creating new test certificate because I have lost my old certificate :D

So... Just click Create Test Certificate, enter your password then click OK :

Result :

Recompile your C# code again... aaaaanddd... :

Yaaapzz... There are no errors detected.... :-)