IndexOutOfRangeException Exception

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using System;
   
class MainClass
{
    public static void Main()
    {
        try
        {
            int [] IntegerArray = new int [5];
   
            IntegerArray[10] = 123;
   
            // wait for user to acknowledge the results
            Console.WriteLine("Hit Enter to terminate...");
            Console.Read();
        }
        catch(IndexOutOfRangeException)
        {
            Console.WriteLine("An invalid element index access was attempted.");
        }
    }
}
           
          


InvalidCastException Exception

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using System;
   
class MainClass
{
    public static void Main()
    {
        try
        {
            MainClass       MyObject = new MainClass();
            IFormattable    Formattable;
   
            Formattable = (IFormattable)MyObject;
   
            // wait for user to acknowledge the results
            Console.WriteLine("Hit Enter to terminate...");
            Console.Read();
        }
        catch(InvalidCastException)
        {
            Console.WriteLine("MyObject does not implement the IFormattable interface.");
        }
    }
}
           
          


NullReferenceException Exception

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using System;
   
class MyClass {
    public int Value;
}
   
class MainClass
{
    public static void Main()
    {
        try
        {
            MyClass MyObject = new MyClass();
            MyObject = null;
   
            MyObject.Value = 123;
   
            // wait for user to acknowledge the results
            Console.WriteLine("Hit Enter to terminate...");
            Console.Read();
        }
        catch(NullReferenceException)
        {
            Console.WriteLine("Cannot reference a null object.");
   
            // wait for user to acknowledge the results
            Console.Read();
        }
    }
}

           
          


Convert byte array to Int32

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using System;
using System.IO;

class MainClass
{
    public static byte[] DecimalToByteArray (decimal src){
        using (MemoryStream stream = new MemoryStream()) {
           using (BinaryWriter writer = new BinaryWriter(stream)){
               writer.Write(src);
               return stream.ToArray();
           }
        }
    }
    public static decimal ByteArrayToDecimal (byte[] src){
        using (MemoryStream stream = new MemoryStream(src)){
           using (BinaryReader reader = new BinaryReader(stream)){
              return reader.ReadDecimal();
           }
        }
    }
    public static void Main()
    {
        byte[] b = null;

        b = BitConverter.GetBytes(true);
        Console.WriteLine(BitConverter.ToString(b));

        Console.WriteLine(BitConverter.ToBoolean(b, 0));

        b = BitConverter.GetBytes(3678);
        Console.WriteLine(BitConverter.ToString(b));

        Console.WriteLine(BitConverter.ToInt32(b, 0));

        b = DecimalToByteArray(285998345545.563846696m);
        Console.WriteLine(BitConverter.ToString(b));

        Console.WriteLine(ByteArrayToDecimal(b));
    }
    
}