The type or namespace name 'Extensions' does not exist in the namespace 'OpenCvSharp&-CodePudding

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The type or namespace name 'Extensions' does not exist in the namespace 'OpenCvSharp&

Time：09-05

I am new to C# and Winforms. I am following a tutorial to use OpenCVSharp4 (it says version 3 is now deprecated). But I get this error.

I have added both OpenCvSharp4 and OpenCvSharp4.runtime.win in Nuget. When I view the code in Github, I can find the namespace there in version 4 of OpenCvSharp. E.g.

Otherwise there would be "using OpenCvSharp.Extensions", not "namespace OpenCvSharp.Extensions".

This is the sample in the main page :

Page link：https//www.codepudding.com/Enterprise/533632.html

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winforms

opencvsharp

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