Is there a way to see the codes inside nugets?

https://docs.microsoft.com/en-us/nuget/quickstart/install-and-use-a-package-in-visual-studio

This says that nugets are codes other programmers have done for us.

I download a lot of nugets. Notably newtonsoft json and nethereum.

However, I can never see the code inside the objects I use.

For example,

Why I cannot send ftm with this simple code

The nethereum nugget thrown an exception. The most likely cause is I am using fantom blockchain that doesn't support some new ethereum feature.

However, I cannot step into nethereum codes and see that.

I wonder if I actually can do that.

Nethereum is open source.

Are all nugets open source?

In visual studio.

I can right click and go to definition. However I cannot see the implementation.

For example

Nethereum.RPC will look like this

#region Assembly Nethereum.RPC, Version=4.5.0.0, Culture=neutral, PublicKeyToken=8768a594786aba4e// C:\Users\teguh\.nuget\packages\nethereum.rpc\4.5.0\lib\net5.0\Nethereum.RPC.dll// Decompiled with ICSharpCode.Decompiler 7.1.0.6543#endregionusing System.Collections.Generic;using Nethereum.Hex.HexTypes;using Newtonsoft.Json;namespace Nethereum.RPC.Eth.DTOs{    public class TransactionInput : CallInput    {        [JsonProperty(PropertyName = "nonce")]        public HexBigInteger Nonce { get; set; }        [JsonProperty(PropertyName = "accessList")]        public List<AccessList> AccessList { get; set; }        public TransactionInput()        {        }        public TransactionInput(string data, string addressTo)            : base(data, addressTo)        {        }        public TransactionInput(string data, string addressTo, HexBigInteger value)            : base(data, addressTo, value)        {        }        public TransactionInput(string data, string addressTo, string addressFrom, HexBigInteger gas, HexBigInteger value)            : base(data, addressTo, addressFrom, gas, value)        {        }        public TransactionInput(string data, string addressFrom, HexBigInteger gas, HexBigInteger value)            : base(data, addressFrom, gas, value)        {        }        public TransactionInput(string data, string addressTo, string addressFrom, HexBigInteger gas, HexBigInteger gasPrice, HexBigInteger value)            : base(data, addressTo, addressFrom, gas, gasPrice, value)        {        }        public TransactionInput(string data, HexBigInteger gas, string addressFrom)            : base(data, gas, addressFrom)        {        }        public TransactionInput(HexBigInteger type, string data, string addressTo, string addressFrom, HexBigInteger gas, HexBigInteger value, HexBigInteger maxFeePerGas, HexBigInteger maxPriorityFeePerGas)            : base(data, addressTo, addressFrom, gas, value, type, maxFeePerGas, maxPriorityFeePerGas)        {        }    }}#if false // Decompilation log

Just the interface. No implementation.