The full form of DLL isDynamic Link Library.
It is a package that contains important code or libraries for reference and used by the program.
What Is Msdia80.dll
What is msdia80.dll?

Msdia80.dll is a jot down of .dll file that contains essential codes and programs needed by specific applications.
The correct path is C:\Program Files (x86)\Common Files\microsoft shared\VC.
Should You Delete Msdia80.dll
Sometimes, you may encounter some issues with the msdia80.dl issue.
Then, you may want to know should you delete the msdia80.dll file?
Its not recommended you to delete it.
Some applications will be unable to access these codes and will stop working properly if you delete it.
By the way, your files will be located where the operating system is located.
Here is how to do that
Step 1:Press theWindows+Ekeys at the same time to openFile Explorer.
Step 2:Find the root directory drive where msdia80.dll is present.
Then right-click it to chooseCut.
After that, register the file.
Step 5:Open Command prompt and run it as Administrator.
Step 6:Now, execute the following command, including the double-quotes.
Step 2:After that, selectvcredist_x86.exeandvcredist_ x64.exeand download them.
Step 3:Run these executables and wait for their installation.
Step 4:Now, right-click it and selectRun as administratorto launch them.
Step 5:Then, go to theMicrosoft Visual C++ 2005 service pack 1 Redistributable package MFC security updatepackage.
Step 6:Selectvcredist_x86.exeandvcredist_x64.exe, then download them to the inaccessible locations.
Run and launch them.
At last, power cycle your box and ensure the changes made.
Final Words
To sum up, this post has introduced what msdia80.dll is.
In addition, you know that its not recommended to delete it.