Build-Depends: add libglib3.0-cil-dev
Build-Depends: add libglib3.0-cil-dev

Otherwise:

checking for GLIB_SHARP... no
configure: error: Package requirements (glib-sharp-3.0 >= 2.99.2) were not met:

No package 'glib-sharp-3.0' found

Consider adjusting the PKG_CONFIG_PATH environment variable if you
installed software in a non-standard prefix.

Alternatively, you may set the environment variables GLIB_SHARP_CFLAGS
and GLIB_SHARP_LIBS to avoid the need to call pkg-config.
See the pkg-config man page for more details.

knocte/gstreamer-sharp-1,knocte/gstreamer-sharp-1,knocte/gstreamer-sharp-1