getversion.cs

//imgui native:
        [DllImport(cimguiLib)]
        public static extern byte* igGetVersion();
        
//imgui
        public static unsafe string GetVersion()
        {
            var version = ImGuiNative.igGetVersion();
            int length = 0;
            while (version[length] != '\0')
                length++;
            return System.Text.Encoding.UTF8.GetString(version, length);
        }