System.Runtime.Serialization.Formatters.Binary.WriteObjectInfo.GetTypeFullName C# (CSharp) Method

        internal string GetTypeFullName() => _binderTypeName ?? _cache._fullTypeName;

 internal static BinaryTypeEnum GetBinaryTypeInfo(Type type, WriteObjectInfo objectInfo, string typeName, ObjectWriter objectWriter, out object typeInformation, out int assemId)
 {
     BinaryTypeEnum primitive;
     assemId = 0;
     typeInformation = null;
     if (object.ReferenceEquals(type, Converter.typeofString))
     {
         return BinaryTypeEnum.String;
     }
     if (((objectInfo == null) || ((objectInfo != null) && !objectInfo.isSi)) && object.ReferenceEquals(type, Converter.typeofObject))
     {
         return BinaryTypeEnum.Object;
     }
     if (object.ReferenceEquals(type, Converter.typeofStringArray))
     {
         return BinaryTypeEnum.StringArray;
     }
     if (object.ReferenceEquals(type, Converter.typeofObjectArray))
     {
         return BinaryTypeEnum.ObjectArray;
     }
     if (Converter.IsPrimitiveArray(type, out typeInformation))
     {
         return BinaryTypeEnum.PrimitiveArray;
     }
     InternalPrimitiveTypeE ee = objectWriter.ToCode(type);
     switch (ee)
     {
         case InternalPrimitiveTypeE.Invalid:
         {
             string fullName = null;
             if (objectInfo == null)
             {
                 fullName = type.Assembly.FullName;
                 typeInformation = type.FullName;
             }
             else
             {
                 fullName = objectInfo.GetAssemblyString();
                 typeInformation = objectInfo.GetTypeFullName();
             }
             if (fullName.Equals(Converter.urtAssemblyString))
             {
                 primitive = BinaryTypeEnum.ObjectUrt;
                 assemId = 0;
                 return primitive;
             }
             primitive = BinaryTypeEnum.ObjectUser;
             assemId = (int) objectInfo.assemId;
             if (assemId == 0)
             {
                 throw new SerializationException(Environment.GetResourceString("Serialization_AssemblyId", new object[] { typeInformation }));
             }
             return primitive;
         }
     }
     primitive = BinaryTypeEnum.Primitive;
     typeInformation = ee;
     return primitive;
 }