# Int64

***

**1. Storing Precise Numerical Values**

```csharp
long id = 9223372036854775807L;
```

**2. Representing Dates and Times as Timestamps**

```csharp
DateTime timestamp = new DateTime(2023, 1, 1, 0, 0, 0, DateTimeKind.Utc);
long timestampAsInt64 = timestamp.ToFileTimeUtc();
```

**3. Generating Unique IDs**

```csharp
long uniqueId = DateTime.UtcNow.ToFileTimeUtc();
```

**4. Counting Events or Objects**

```csharp
long count = 1234567890L;
```

**5. Measuring Time Elapsed**

```csharp
Stopwatch stopwatch = new Stopwatch();
stopwatch.Start();
// Do something
stopwatch.Stop();
long elapsedMilliseconds = stopwatch.ElapsedMilliseconds;
```

**6. Storing Currency Amounts**

```csharp
decimal price = 123.45M;
long priceAsInt64 = (long)(price * 100);
```

**7. Representing IP Addresses**

```csharp
IPAddress ipAddress = IPAddress.Parse("192.168.1.1");
long ipAddressAsInt64 = ipAddress.Address;
```

**8. Saving Space by Storing Numbers in a Compact Form**

```csharp
long compactNumber = 0x1234567890L;
```

**9. Storing Large Numbers Beyond Int32's Range**

```csharp
long largeNumber = 9223372036854775807L;
```

**10. Mathematical Operations**

```csharp
long a = 10L;
long b = 20L;
long c = a + b; // Addition
long d = a - b; // Subtraction
long e = a * b; // Multiplication
long f = a / b; // Division
long g = a % b; // Remainder
```

**11. Bitwise Operations**

```csharp
long a = 0b10101010L;
long b = 0b01010101L;
long c = a & b; // Bitwise AND
long d = a | b; // Bitwise OR
long e = a ^ b; // Bitwise XOR
long f = ~a; // Bitwise NOT
```

**12. Logical Operations**

```csharp
long a = 10L;
long b = 20L;
bool c = a < b; // Less than
bool d = a > b; // Greater than
bool e = a <= b; // Less than or equal
bool f = a >= b; // Greater than or equal
bool g = a == b; // Equal
bool h = a != b; // Not equal
```

**13. Conditional Statements**

```csharp
long a = 10L;
if (a > 0)
{
    // Do something
}
else
{
    // Do something else
}
```

**14. Looping**

```csharp
long i = 0;
while (i < 10L)
{
    // Do something
    i++;
}
```

**15. Arrays**

```csharp
long[] numbers = new long[] { 1, 2, 3, 4, 5 };
```

**16. Lists**

```csharp
List<long> numbers = new List<long> { 1, 2, 3, 4, 5 };
```

**17. Dictionaries**

```csharp
Dictionary<string, long> numbers = new Dictionary<string, long> { { "One", 1 }, { "Two", 2 } };
```

**18. File Sizes**

```csharp
long fileSize = new FileInfo("file.txt").Length;
```

**19. Performance Counters**

```csharp
PerformanceCounter counter = new PerformanceCounter("Memory", "Available MBytes");
long availableMemory = counter.NextValue();
```

**20. Database Primary Keys**

```csharp
long id = context.Customers.First().Id;
```

**21. Paging and Sorting**

```csharp
var customers = context.Customers
    .OrderBy(c => c.Name)
    .Skip(10)
    .Take(5);
```

**22. XML Serialization**

```csharp
XmlSerializer serializer = new XmlSerializer(typeof(Customer));
using (Stream stream = new MemoryStream())
{
    serializer.Serialize(stream, new Customer());
}
```

**23. JSON Serialization**

```csharp
string json = JsonConvert.SerializeObject(new Customer());
```

**24. Data Transfer Objects (DTOs)**

```csharp
public class CustomerDto
{
    public long Id { get; set; }
    public string Name { get; set; }
}
```

**25. Command-Line Arguments**

```csharp
string[] args = Environment.GetCommandLineArgs();
if (args.Length > 1)
{
    long id = long.Parse(args[1]);
}
```

**26. Random Number Generation**

```csharp
Random random = new Random();
long randomNumber = random.NextInt64();
```

**27. Encryption and Decryption**

```csharp
byte[] key = new byte[] { 0x12, 0x34, 0x56, 0x78, 0x90 };
byte[] data = new byte[] { 0x10, 0x20, 0x30, 0x40 };
byte[] encryptedData = Cryptography.Encrypt(data, key);
byte[] decryptedData = Cryptography.Decrypt(encryptedData, key);
```

**28. Hashing**

```csharp
string data = "Hello World";
byte[] hashedData = Cryptography.Hash(data);
```

**29. Data Validation**

```csharp
public bool IsValidPhoneNumber(string phoneNumber)
{
    long number;
    return long.TryParse(phoneNumber, out number) && phoneNumber.Length == 10;
}
```

**30. Performance Optimization**

```csharp
long count = 0L;
for (int i = 0; i < 10000; i++)
{
    count++;
}
```

**31. Memory Management**

```csharp
long[] numbers = new long[1000000]; // Allocate memory
GC.Collect(); // Release memory
```

**32. Interprocess Communication**

```csharp
using System.Runtime.InteropServices;

[DllImport("kernel32.dll")]
public static extern long GetCurrentProcessId();

long processId = GetCurrentProcessId();
```

**33. Multithreading**

```csharp
Thread thread = new Thread(() =>
{
    long sum = 0L;
    for (int i = 0; i < 1000000; i++)
    {
        sum += i;
    }
});
thread.Start();
thread.Join();
```

**34. Exception Handling**

```csharp
try
{
    long number = Convert.ToInt64("abc");
}
catch (FormatException ex)
{
    // Handle exception
}
```

**35. Unit Testing**

```csharp
[Fact]
public void CanAddTwoNumbers()
{
    long a = 10L;
    long b = 20L;
    long result = a + b;
    Assert.Equal(30L, result);
}
```

**36. Logging**

```csharp
using Serilog;

ILogger logger = Log.Logger;
logger.Information("Value of count: {Count}", count);
```

**37. Azure Storage**

```csharp
using Microsoft.Azure.Storage;
using Microsoft.Azure.Storage.Blob;

CloudBlobContainer container = storageAccount.CreateCloudBlobContainer("my-container");
CloudBlockBlob blob = container.GetBlockBlobReference("my-blob");
blob.Metadata["Size"] = fileSize.ToString();
```

**38. Amazon Web Services (AWS)**

```csharp
using Amazon;
using Amazon.S3;

AmazonS3Client s3Client = new AmazonS3Client(RegionEndpoint.USEast1);
PutObjectRequest request = new PutObjectRequest
{
    BucketName = "my-bucket",
    Key = "my-object",
    ContentLength = fileSize
};
```

**39. Google Cloud Platform (GCP)**

```csharp
using Google.Cloud.Storage.V1;

StorageClient storageClient = StorageClient.Create();
StorageObject storageObject = storageClient.GetObject("my-bucket", "my-object");
long fileSize = storageObject.Size;
```

**40. Machine Learning**

```csharp
using Microsoft.ML;

MLContext mlContext = new MLContext();
IDataView dataView = mlContext.Data.LoadFromEnumerable(new List<DataPoint>()
{
    new DataPoint() { Features = new float[] { 1f, 2f, 3f }, Label = 4f },
    // ...
});
ITransformer trainedModel = mlContext.Regression.Trainers.LinearRegression().Fit(dataView);
PredictionEngine<DataPoint, Prediction> predictionEngine = mlContext.Model.CreatePredictionEngine<DataPoint, Prediction>(trainedModel);
Prediction prediction = predictionEngine.Predict(new DataPoint() { Features = new float[] { 1f, 2f, 3f } });
```

**41. Image Processing**

```csharp
using System.Drawing;

Bitmap bitmap = new Bitmap("image.jpg");
long width = bitmap.Width;
long height = bitmap.Height;
```

**42. Audio Processing**

```csharp
using NAudio;
using NAudio.Wave;

AudioFileReader audioFileReader = new AudioFileReader("audio.wav");
long duration = audioFileReader.TotalTime.Ticks / 10000;
```

**43. Video Processing**

```csharp
using System.Drawing.Imaging;
using VideoLibrary;

YouTube video = YouTube.Default.GetVideo("https://www.youtube.com/watch?v=dQw4w9WgXcQ");
VideoDefinition videoDefinition = video.Formats.First(f => f.Resolution == "360p");
long duration = videoDefinition.Duration.Ticks / 10000000L;
```

**44. Cryptocurrency**

```csharp
using BitcoinLib.Services.Coins.Bitcoin;

BitcoinService bitcoinService = new BitcoinService();
long balance = bitcoinService.GetBalance("1234567890abcdef");
```

**45. Blockchain**

```csharp
using Nethereum.Web3;

Web3 web3 = new Web3("https://mainnet.infura.io/v3/1234567890abcdef");
long blockHeight = web3.Eth.Blocks.GetBlockNumber.SendRequestAsync().Result.Value;
```

**46. Social Media**

```csharp
using Twitterizer;

TwitterAccount account = TwitterAccount.Create("1234567890abcdef", "secret");
long followerCount = account.FollowersCount;
```

**47. E-commerce**

```csharp
using ShopifySharp;

ShopifyService service = new ShopifyService("my-store.myshopify.com", "1234567890abcdef");
Product product = service.GetProduct(1234567890L);
long stockCount = product.InventoryQuantity;
```

**48. DevOps**

```csharp
using System.Management.Automation;

using (PowerShell powershell = PowerShell.Create())
{
    powershell.AddScript("Get-Process -Id 1234567890 | Select-Object -ExpandProperty Id");
    Collection<PSObject> results = powershell.Invoke();
    long processId = long.Parse(results[0].ToString());
}
```

**49. Cloud Computing**

```csharp
using Google.Cloud.Compute.V1;

ComputeService computeService = ComputeService.Create();
Operation<Operation, Instance> operation = computeService.InsertInstance(
    projectId: "my-project",
    zone: "us-central1-a",
    instanceResource: new Instance()
    {
        Name = "my-instance",
        MachineType = "n1-standard-1",
        Disks = new List<AttachedDisk>
        {
            new AttachedDisk
            {
                InitializeParams = new AttachedDiskInitializeParams
                {
                    DiskSizeGb = 100,
                    SourceImage = "projects/debian-cloud/global/images/family/debian-10"
                },
                AutoDelete = true,
                Boot = true
            }
        },
        NetworkInterfaces = new List<NetworkInterface>
        {
            new NetworkInterface
            {
                Name = "global/networks/default"
            }
        }
    });
operation.Wait(OperationWaitOptions.InfiniteRetry);
long instanceId = operation.Result.Id;
```

**50. Internet of Things (IoT)**

```csharp
using Google.Cloud.Iot.V1;

DeviceManagerServiceClient deviceManagerServiceClient = DeviceManagerServiceClient.Create();
Device device = deviceManagerServiceClient.GetDevice(
    projectId: "my-project",
    cloudRegion: "us-central1",
    registryId: "my-registry",
    deviceId: "my-device");
long lastHeartbeatTime = device.LastHeartbeatTime.ToDateTimeOffset().ToUnixTimeSeconds();
```