System.Runtime.Serialization.Formatters.Binary.ObjectWriter.GetAssemblyId C# (CSharp) Method

        private long GetAssemblyId(WriteObjectInfo objectInfo)
        {
            //use objectInfo to get assembly string with new criteria
            if (_assemblyToIdTable == null)
            {
                _assemblyToIdTable = new Dictionary<string, long>();
            }

            long assemId = 0;
            string assemblyString = objectInfo.GetAssemblyString();

            string serializedAssemblyString = assemblyString;
            if (assemblyString.Length == 0)
            {
                assemId = 0;
            }
            else if (assemblyString.Equals(Converter.s_urtAssemblyString))
            {
                // Urt type is an assemId of 0. No assemblyString needs
                // to be sent 
                assemId = 0;
            }
            else
            {
                // Assembly needs to be sent
                // Need to prefix assembly string to separate the string names from the
                // assemblyName string names. That is a string can have the same value
                // as an assemblyNameString, but it is serialized differently
                bool isNew = false;
                if (_assemblyToIdTable.TryGetValue(assemblyString, out assemId))
                {
                    isNew = false;
                }
                else
                {
                    assemId = InternalGetId("___AssemblyString___" + assemblyString, false, null, out isNew);
                    _assemblyToIdTable[assemblyString] = assemId;
                }

                _serWriter.WriteAssembly(objectInfo._objectType, serializedAssemblyString, (int)assemId, isNew);
            }
            return assemId;
        }