CODEWITHSUNDEEP
c#.netvisual-studio-2012
Fred
Fred

Reputation: 4076

No System.Runtime.Caching available?

output type of 'Class Library', and a target framework of '.NET Framework 4'.

According to everything I've read, I should have it available, but all I'm seeing in the System.Runtime namespace is the following:

CompilerServices
ConstrainedExecution
ExceptionServices
Hosting
InteropServices
Remoting
Serialization
Versioning

Any ideas?

Upvotes: 36

Views: 33144

Answers (4)

workabyte
workabyte

Reputation: 3775

For me the System.Runtime.Caching NuGet package is what I needed little bit o this and all was well

dotnet add package System.Runtime.Caching --version 5.0.0

Upvotes: 3

Jon Skeet
Jon Skeet

Reputation: 1502825

You just need to add a reference to the System.Runtime.Caching assembly.

  1. In solution explorer, right-click on "References"
  2. Select "Add reference"
  3. From left side menu select "Assemblies"
  4. Look for (or filter) and add System.Runtime.Caching.dll.

It's not part of the default set of references in a class library, but you should be able to add it with no problems.

Upvotes: 68

Irf
Irf

Reputation: 4617

To complement Jon Skeets answer, (for those who run into this problem), if you still get red squiggly lines under Caching after having added reference to System.Runtime.Caching assembly, just restart the Visual Studio, after having saved the solution, and you should be good to go.

Visual Studio red squiggly lines

Having added the reference, saved the solution and ( if need may be ) restarted Visual Studio, you should be able to use the types within this namespace. In order to get my solution to work, I had to do this very way.

Edit:

While trying to recreate the problem, and solving this way, it seems that we need to set Copy Local to True in System.Runtime.Caching > Properties and then restart Visual Studio for getting it to work. At least, for my case, the problem didn't seem to solve without this. ;)

enter image description here

Upvotes: 18

tmesser
tmesser

Reputation: 7666

Reference System.Runtime.Caching.dll. This is another one of those rather obtuse gotchas in the .NET framework right now where there will be very similar namespaces in some things, but the actual classes you want will be referenced in different assembles. As an example, CacheItem is in this alternate DLL, whereas ApplicationActivator (in System.Runtime.Hosting) is in mscorlib.

Upvotes: 5

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