[Solved] Windows Form Error: Duplicate items are not supported by the Resources parameter

Hi smile,

Please refer below steps.

Steps

1) Right-click your project and select "Unload Project"

2) Right-click again and "Edit your_project.csproj"

3) Search for the duplicate files mentioned in the error message and remove them.

4) Save and close.

5) Right-click to choose "Reload Project" .

Reference:

https://stackoverflow.com/questions/14889973/the-item-was-specified-more-than-once-in-the-resources-parameter-duplicate-it

https://stackoverflow.com/questions/10065997/duplicate-items-are-not-supported-by-the-resources-parameter