Mist Wallet Contract

contract.json

[
  {
    "constant": false,
    "inputs": [
      {
        "name": "_owner",
        "type": "address",
        "typeShort": "address",
        "bits": "",
        "displayName": "&thinsp;<span class=\"punctuation\">_</span>&thinsp;owner",
        "template": "elements_input_address"
      }
    ],
    "name": "removeOwner",
    "outputs": [ ],
    "type": "function",
    "displayName": "remove Owner"
  },
  {
    "constant": false,
    "inputs": [
      {
        "name": "_addr",
        "type": "address",
        "typeShort": "address",
        "bits": "",
        "displayName": "&thinsp;<span class=\"punctuation\">_</span>&thinsp;addr",
        "template": "elements_input_address"
      }
    ],
    "name": "isOwner",
    "outputs": [
      {
        "name": "",
        "type": "bool"
      }
    ],
    "type": "function",
    "displayName": "is Owner"
  },
  {
    "constant": true,
    "inputs": [ ],
    "name": "m_numOwners",
    "outputs": [
      {
        "name": "",
        "type": "uint256",
        "value": "2",
        "displayName": ""
      }
    ],
    "type": "function",
    "displayName": "m<span class=\"punctuation\">_</span>num Owners"
  },
  {
    "constant": true,
    "inputs": [ ],
    "name": "m_lastDay",
    "outputs": [
      {
        "name": "",
        "type": "uint256",
        "value": "16891",
        "displayName": ""
      }
    ],
    "type": "function",
    "displayName": "m<span class=\"punctuation\">_</span>last Day"
  },
  {
    "constant": true,
    "inputs": [ ],
    "name": "version",
    "outputs": [
      {
        "name": "",
        "type": "uint256",
        "value": "2",
        "displayName": ""
      }
    ],
    "type": "function",
    "displayName": "version"
  },
  {
    "constant": false,
    "inputs": [ ],
    "name": "resetSpentToday",
    "outputs": [ ],
    "type": "function",
    "displayName": "reset Spent Today"
  },
  {
    "constant": true,
    "inputs": [ ],
    "name": "m_spentToday",
    "outputs": [
      {
        "name": "",
        "type": "uint256",
        "value": "0",
        "displayName": ""
      }
    ],
    "type": "function",
    "displayName": "m<span class=\"punctuation\">_</span>spent Today"
  },
  {
    "constant": false,
    "inputs": [
      {
        "name": "_owner",
        "type": "address",
        "typeShort": "address",
        "bits": "",
        "displayName": "&thinsp;<span class=\"punctuation\">_</span>&thinsp;owner",
        "template": "elements_input_address"
      }
    ],
    "name": "addOwner",
    "outputs": [ ],
    "type": "function",
    "displayName": "add Owner"
  },
  {
    "constant": true,
    "inputs": [ ],
    "name": "m_required",
    "outputs": [
      {
        "name": "",
        "type": "uint256",
        "value": "0",
        "displayName": ""
      }
    ],
    "type": "function",
    "displayName": "m<span class=\"punctuation\">_</span>required"
  },
  {
    "constant": false,
    "inputs": [
      {
        "name": "_h",
        "type": "bytes32",
        "typeShort": "bytes",
        "bits": "32",
        "displayName": "&thinsp;<span class=\"punctuation\">_</span>&thinsp;h",
        "template": "elements_input_bytes"
      }
    ],
    "name": "confirm",
    "outputs": [
      {
        "name": "",
        "type": "bool"
      }
    ],
    "type": "function",
    "displayName": "confirm"
  },
  {
    "constant": false,
    "inputs": [
      {
        "name": "_newLimit",
        "type": "uint256",
        "typeShort": "uint",
        "bits": "256",
        "displayName": "&thinsp;<span class=\"punctuation\">_</span>&thinsp;new Limit",
        "template": "elements_input_uint"
      }
    ],
    "name": "setDailyLimit",
    "outputs": [ ],
    "type": "function",
    "displayName": "set Daily Limit"
  },
  {
    "constant": false,
    "inputs": [
      {
        "name": "_to",
        "type": "address",
        "typeShort": "address",
        "bits": "",
        "displayName": "&thinsp;<span class=\"punctuation\">_</span>&thinsp;to",
        "template": "elements_input_address"
      },
      {
        "name": "_value",
        "type": "uint256",
        "typeShort": "uint",
        "bits": "256",
        "displayName": "&thinsp;<span class=\"punctuation\">_</span>&thinsp;value",
        "template": "elements_input_uint"
      },
      {
        "name": "_data",
        "type": "bytes",
        "typeShort": "bytes",
        "bits": "",
        "displayName": "&thinsp;<span class=\"punctuation\">_</span>&thinsp;data",
        "template": "elements_input_bytes"
      }
    ],
    "name": "execute",
    "outputs": [
      {
        "name": "_r",
        "type": "bytes32"
      }
    ],
    "type": "function",
    "displayName": "execute"
  },
  {
    "constant": false,
    "inputs": [
      {
        "name": "_operation",
        "type": "bytes32",
        "typeShort": "bytes",
        "bits": "32",
        "displayName": "&thinsp;<span class=\"punctuation\">_</span>&thinsp;operation",
        "template": "elements_input_bytes"
      }
    ],
    "name": "revoke",
    "outputs": [ ],
    "type": "function",
    "displayName": "revoke"
  },
  {
    "constant": false,
    "inputs": [
      {
        "name": "_newRequired",
        "type": "uint256",
        "typeShort": "uint",
        "bits": "256",
        "displayName": "&thinsp;<span class=\"punctuation\">_</span>&thinsp;new Required",
        "template": "elements_input_uint"
      }
    ],
    "name": "changeRequirement",
    "outputs": [ ],
    "type": "function",
    "displayName": "change Requirement"
  },
  {
    "constant": true,
    "inputs": [
      {
        "name": "_operation",
        "type": "bytes32",
        "typeShort": "bytes",
        "bits": "32",
        "displayName": "&thinsp;<span class=\"punctuation\">_</span>&thinsp;operation",
        "template": "elements_input_bytes"
      },
      {
        "name": "_owner",
        "type": "address",
        "typeShort": "address",
        "bits": "",
        "displayName": "&thinsp;<span class=\"punctuation\">_</span>&thinsp;owner",
        "template": "elements_input_address"
      }
    ],
    "name": "hasConfirmed",
    "outputs": [
      {
        "name": "",
        "type": "bool",
        "value": false,
        "displayName": ""
      }
    ],
    "type": "function",
    "displayName": "has Confirmed"
  },
  {
    "constant": false,
    "inputs": [
      {
        "name": "_to",
        "type": "address",
        "typeShort": "address",
        "bits": "",
        "displayName": "&thinsp;<span class=\"punctuation\">_</span>&thinsp;to",
        "template": "elements_input_address"
      }
    ],
    "name": "kill",
    "outputs": [ ],
    "type": "function",
    "displayName": "kill"
  },
  {
    "constant": false,
    "inputs": [
      {
        "name": "_from",
        "type": "address",
        "typeShort": "address",
        "bits": "",
        "displayName": "&thinsp;<span class=\"punctuation\">_</span>&thinsp;from",
        "template": "elements_input_address"
      },
      {
        "name": "_to",
        "type": "address",
        "typeShort": "address",
        "bits": "",
        "displayName": "&thinsp;<span class=\"punctuation\">_</span>&thinsp;to",
        "template": "elements_input_address"
      }
    ],
    "name": "changeOwner",
    "outputs": [ ],
    "type": "function",
    "displayName": "change Owner"
  },
  {
    "constant": true,
    "inputs": [ ],
    "name": "m_dailyLimit",
    "outputs": [
      {
        "name": "",
        "type": "uint256",
        "value": "1e+26",
        "displayName": ""
      }
    ],
    "type": "function",
    "displayName": "m<span class=\"punctuation\">_</span>daily Limit"
  },
  {
    "inputs": [
      {
        "name": "_owners",
        "type": "address[]"
      },
      {
        "name": "_required",
        "type": "uint256"
      },
      {
        "name": "_daylimit",
        "type": "uint256"
      }
    ],
    "type": "constructor"
  },
  {
    "anonymous": false,
    "inputs": [
      {
        "indexed": false,
        "name": "owner",
        "type": "address"
      },
      {
        "indexed": false,
        "name": "operation",
        "type": "bytes32"
      }
    ],
    "name": "Confirmation",
    "type": "event"
  },
  {
    "anonymous": false,
    "inputs": [
      {
        "indexed": false,
        "name": "owner",
        "type": "address"
      },
      {
        "indexed": false,
        "name": "operation",
        "type": "bytes32"
      }
    ],
    "name": "Revoke",
    "type": "event"
  },
  {
    "anonymous": false,
    "inputs": [
      {
        "indexed": false,
        "name": "oldOwner",
        "type": "address"
      },
      {
        "indexed": false,
        "name": "newOwner",
        "type": "address"
      }
    ],
    "name": "OwnerChanged",
    "type": "event"
  },
  {
    "anonymous": false,
    "inputs": [
      {
        "indexed": false,
        "name": "newOwner",
        "type": "address"
      }
    ],
    "name": "OwnerAdded",
    "type": "event"
  },
  {
    "anonymous": false,
    "inputs": [
      {
        "indexed": false,
        "name": "oldOwner",
        "type": "address"
      }
    ],
    "name": "OwnerRemoved",
    "type": "event"
  },
  {
    "anonymous": false,
    "inputs": [
      {
        "indexed": false,
        "name": "newRequirement",
        "type": "uint256"
      }
    ],
    "name": "RequirementChanged",
    "type": "event"
  },
  {
    "anonymous": false,
    "inputs": [
      {
        "indexed": false,
        "name": "from",
        "type": "address"
      },
      {
        "indexed": false,
        "name": "value",
        "type": "uint256"
      }
    ],
    "name": "Deposit",
    "type": "event"
  },
  {
    "anonymous": false,
    "inputs": [
      {
        "indexed": false,
        "name": "owner",
        "type": "address"
      },
      {
        "indexed": false,
        "name": "value",
        "type": "uint256"
      },
      {
        "indexed": false,
        "name": "to",
        "type": "address"
      },
      {
        "indexed": false,
        "name": "data",
        "type": "bytes"
      }
    ],
    "name": "SingleTransact",
    "type": "event"
  },
  {
    "anonymous": false,
    "inputs": [
      {
        "indexed": false,
        "name": "owner",
        "type": "address"
      },
      {
        "indexed": false,
        "name": "operation",
        "type": "bytes32"
      },
      {
        "indexed": false,
        "name": "value",
        "type": "uint256"
      },
      {
        "indexed": false,
        "name": "to",
        "type": "address"
      },
      {
        "indexed": false,
        "name": "data",
        "type": "bytes"
      }
    ],
    "name": "MultiTransact",
    "type": "event"
  },
  {
    "anonymous": false,
    "inputs": [
      {
        "indexed": false,
        "name": "operation",
        "type": "bytes32"
      },
      {
        "indexed": false,
        "name": "initiator",
        "type": "address"
      },
      {
        "indexed": false,
        "name": "value",
        "type": "uint256"
      },
      {
        "indexed": false,
        "name": "to",
        "type": "address"
      },
      {
        "indexed": false,
        "name": "data",
        "type": "bytes"
      }
    ],
    "name": "ConfirmationNeeded",
    "type": "event"
  }
]

sample.cs

// testnet
var contract = web3.Eth.GetContract(System.IO.File.ReadAllText(Environment.CurrentDirectory + "\\contract.json"), "0xa3969327661Ad9632638b8fe8d5dEF6ceFd94738");
var e = contract.GetEvent("OwnerAdded");
var filterId = await e.CreateFilterAsync();
var changes = await e.GetAllChanges<OwnerAdded>(filterId);
// changes.Length == 0

public class OwnerAdded
{
    [Parameter("address", "newOwner", 1, false)]
    public int NewOwner { get; set; }
}