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Hello,

This is my first project in VS 2017.

I have a lot of errors like these:
Error   CS7069  Reference to type 'ICloneable' claims it is defined in 
'mscorlib', but it could not be found
Error   CS7069  Reference to type 'Component' claims it is defined in 
'System', but it could not be found ClassLibrary3
Error   CS7069  Reference to type 'MarshalByRefObject' claims it is defined 
in 'mscorlib', but it could not be found
Error   CS7069  Reference to type 'MarshalByRefObject' claims it is defined 
in 'mscorlib', but it could not be found
Error   CS7069  Reference to type 'MarshalByRefObject' claims it is defined 
in 'mscorlib', but it could not be found


I'm trying to create sql connection like this:
using (SqlConnection conn = new SqlConnection(connstr)) {..}


What I have tried:

Tried to add references to mscorlib of the targeted .Net version.
Tried to use this solution NuGet Gallery | Microsoft.NETCore.Portable.Compatibility 1.0.1[^]
Posted
Updated 24-Jun-17 21:55pm
v3

1 solution

See this answer: Reference to type 'MarshalByRefObject' claims it is defined in 'mscorlib', but it could not be found.[^]
Also cleaning up your bin folders and rebuilding the solution could help.
   

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