I am new to C# and need your expertise.
How to make a checkBoxList with subCategories like the example below?
Example layout for
Main Category 100
Sub category 101
Sub category 102
Sub category 103
Sub category 103
Main Category 200
Sub category 201
Sub category 202
Sub category 203
Sub category 203
Main Category 300
Sub category 301
Sub category 302
Main Category 400
Sub category 401
& ...
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