I'm trying to follow the example on building .NET applications here,
https://www.mathworks.com/help/matlab/matlab_external/net-arrays-to-cell-arrays.html
1) In Visual Studio Community (Version 16.7.6) I created a new Class Library (.NET Framework) project and copied the source code from the example.
2) In Properties --> Project Properties, I set the Target Framework to .NET Framework 4.5.
3) I ran Build --> Build Solution successfully. It produced a file "...\NetDotCell\bin\Debug\NetDotCell.dll"
4) In Matlab 2020a I ran NET.addAssembly('...\NetDotCell\bin\Debug\NetDotCell.dll') and got the following error
Message: Could not load file or assembly
'file:///...\NetDotCell\bin\Debug\NetDocCell.dll' or one of its
dependencies. The system cannot find the file specified.
Source: mscorlib
HelpLink: