Rider - evaluation of List is disabled. Use context menu to enable Problem

Question

I've been having trouble previewing the contents of my collection for a while now.

The message is:

Count = Evaluation of System.Private.CoreLib : System.Collections.Generic.List<T> : get_Count () is disabled. Use context menu to enable

As you can see in the screenshot, there is a 'Refresh' button. When I click it, I can see results, but when I move my mouse, the window disappears because the next window is smaller :/

How do I fix this? About 2 months ago, everything was working fine. I have the newest version of Rider and my license is paid and active.

score 9 · Accepted Answer · edited Sep 02 '22 at 06:45

9

Please try any of the following:

Instead of just clicking refresh, right click on it and it will open a context menu. Select Enable Evaluation Of Selected Item in the dropdown
Delete the .idea folder in the root of your project when Rider is not running, then open your project in Rider again and check if the issue is gone
Update project to .net6

The problem has been reported as a bug in Rider's YouTrack.

edited Sep 02 '22 at 06:45

Pang

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answered Mar 08 '22 at 07:43

Korfu

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I didnt have option 'Enable Evaluation Of Selected Item'. Deleting .idea directory worked! Thanks – Nesto Mar 08 '22 at 14:17

score 0 · Answer 2 · answered Sep 11 '22 at 03:41

You can also remove <option> entries (2 examples shown) from workspace.xml inside the .idea folder instead of deleting the folder, then restart Rider.

  <component name="DisabledMethodsStorage">
    <option name="disabledMethods">
      <set>
        <option value="mscorlib : System.Collections.Generic.List&lt;T&gt; : Contains (T)" />
        <option value="mscorlib : System.Collections.Generic.List&lt;T&gt; : get_Count ()" />
      </set>
    </option>
  </component>

Rider - evaluation of List is disabled. Use context menu to enable Problem

2 Answers2