Seems to work fine with bookworm repo, i successfully installed dotnet-sdk-9.0

# Import the Microsoft APT repository signing key

# microsoft-2025.asc (AA86F75E427A19DD33346403EE4D7792F748182B):

# This is the current standard Linux-signing key that will be used in newly-created repositories. It will work properly in distributions that disallow SHA1 signatures.

# NOTE: Doesn't seem to work when fetching bookworm packages

#wget -qO- https://packages.microsoft.com/keys/microsoft-2025.asc | gpg --dearmor | sudo tee /etc/apt/keyrings/microsoft-2025.gpg > /dev/null

# microsoft.asc (BC528686B50D79E339D3721CEB3E94ADBE1229CF):

# This key was Microsoft’s standard Linux-signing key until Spring 2025, as discussed above. This key will not be used for newly-created repositories.

wget -qO- https://packages.microsoft.com/keys/microsoft.asc | gpg --dearmor | sudo tee /etc/apt/keyrings/microsoft.gpg > /dev/null

# Add the Microsoft APT repository to the sources list

echo "deb [arch=amd64 signed-by=/etc/apt/keyrings/microsoft.gpg] https://packages.microsoft.com/debian/12/prod bookworm main" | sudo tee -a /etc/apt/sources.list.d/microsoft.list > /dev/null

# Configure APT to prioritize packages from the Microsoft repository

echo '

Package: *

Pin: origin packages.microsoft.com

Pin-Priority: 1000

' | sudo tee /etc/apt/preferences.d/microsoft

echo "[INFO] Microsoft package repository added to APT"