C# Online Compiler | .NET Fiddle

<no name> by Anonymous

using System;


public interface ISome1
{
    TimeSpan? TestTime { get; }
}

public class Some1 : ISome1
{
   public string TestTime { get; set; }
   
   TimeSpan? ISome1.TestTime
   {
       get { return this.Parse(this.TestTime); }
   }
	
    private TimeSpan? Parse(string text)
    {
        if (text == null)
            return null;

        string[] values = text.Split(':');

        if (values.Length == 2)
            return new TimeSpan(0, 0, int.Parse(values[0]), int.Parse(values[1]));

        if (values.Length == 3)
            return new TimeSpan(0, int.Parse(values[0]), int.Parse(values[1]), int.Parse(values[2]));

        throw new FormatException("Unsupported format of TimeSpan.");
    }
}

public interface ISome2 : ISome1
{
    string Additional { get; }
}

public class Some2 : Some1, ISome2
{
   public string Additional { get; set; }
}

public class Program
{
    public static void Main()
    {
        ISome1 some2 = new Some2() { TestTime = "00:02:00" };

        Console.WriteLine(some2.TestTime?.Days);
    }
}

​x
 
using System;
​
​
public interface ISome1
{
    TimeSpan? TestTime { get; }
}
​
public class Some1 : ISome1
{
   public string TestTime { get; set; }
   
   TimeSpan? ISome1.TestTime
   {
       get { return this.Parse(this.TestTime); }
   }
    
    private TimeSpan? Parse(string text)
    {
        if (text == null)
            return null;
​
        string[] values = text.Split(':');
​
        if (values.Length == 2)
            return new TimeSpan(0, 0, int.Parse(values[0]), int.Parse(values[1]));
​
        if (values.Length == 3)
            return new TimeSpan(0, int.Parse(values[0]), int.Parse(values[1]), int.Parse(values[2]));
​
        throw new FormatException("Unsupported format of TimeSpan.");
    }
}
​
public interface ISome2 : ISome1
{
    string Additional { get; }
}
​
public class Some2 : Some1, ISome2
{
   public string Additional { get; set; }
}
​
public class Program
{
    public static void Main()
    {
        ISome1 some2 = new Some2() { TestTime = "00:02:00" };
​
        Console.WriteLine(some2.TestTime?.Days);
    }
}
​

3 , 4
3 , 4
Numbers: 3
Numbers: 4

Grouping

Grouping By Gender:

Male
Name: Tom - Gender: Male - Age 20
Name: Dick - Gender: Male - Age 20
Name: Harry - Gender: Male - Age 19
Female
Name: Jane - Gender: Female - Age 21
Name: Wendy - Gender: Female - Age 20
Name: Susan - Gender: Female - Age 23

Grouping By Age , over 21:

23
Name: Susan - Gender: Female - Age 23

Grouping By First Letter of Name:

D
Name: Dick - Gender: Male - Age 20
H
Name: Harry - Gender: Male - Age 19
J
Name: Jane - Gender: Female - Age 21
S
Name: Susan - Gender: Female - Age 23
T
Name: Tom - Gender: Male - Age 20
W
Name: Wendy - Gender: Female - Age 20

LINQ METHOD SYNTAX:

D
Name: Dick - Gender: Male - Age 20
H
Name: Harry - Gender: Male - Age 19
J
Name: Jane - Gender: Female - Age 21
S
Name: Susan - Gender: Female - Age 23
T
Name: Tom - Gender: Male - Age 20
W
Name: Wendy - Gender: Female - Age 20

LINQ METHOD SYNTAX, Grouping By Multiple Keys (Gender, Age):

{ Gender = Male, Age = 19 }
Name: Harry
{ Gender = Female, Age = 21 }
Name: Jane
{ Gender = Female, Age = 20 }
Name: Wendy
{ Gender = Female, Age = 23 }
Name: Susan
{ Gender = Male, Age = 20 }
Name: Tom
Name: Dick

Last Run:	8:54:12 am
Compile:	0.237s
Execute:	0.031s
Memory:	24kb
CPU:	0.062s

View IL Code