Edits not effects on solution explorer after closing vs 2022 and reopen it. Even though it effects after i add it directly

Question

I am using visual studio 2022 and .Net 6 in .csproj file i am adding this

`<ItemGroup>
        <Compile Include="./Db/Db.cs" />
        <Compile Include="./Db/Constructors.cs">
            <DependentUpon>./Db/Db.cs</DependentUpon>
        </Compile>
        <Compile Include="./Db/Tables.Internal.cs">
            <DependentUpon>./Db/Db.cs</DependentUpon>
        </Compile>
        <Compile Include="./Db/Tables.DbDirect.cs">
            <DependentUpon>./Db/Db.cs</DependentUpon>
        </Compile>
        <Compile Include="./Db/Tables.InMemory.cs">
            <DependentUpon>./Db/Db.cs</DependentUpon>
        </Compile>
        <Compile Include="./Db/Views.cs">
            <DependentUpon>./Db/Db.cs</DependentUpon>
        </Compile>
        <Compile Include="./Db/Views.Filter.cs">
            <DependentUpon>./Db/Db.cs</DependentUpon>
        </Compile>
    </ItemGroup>
`

and it effect on solution explorer like this

But after closing the visual studio and reopen it the changes on .csproj file still exist but the solusion explorer not efected it become like this

i try yo clean solution and delete .vs directory and delete bin and proj folders but not work. it needs to delete the edits and add it again every time i reopn vs. any help please i've been a while with this problem.

solution for this problem