C# replace number from string array using return string function

 void Main()
{
    var rr= "I am beginner";
    for(int i = 0 ; i < 1000 ; i ++)
        (replacing_String(i.ToString())+"-"+rr).Dump();
}

string replacing_String(string ab)
{
    return Regex.Replace( ab, "[0-9]", "" );
}

 Output

C# Windows Form Application Program Question Print Mathematics Basic Multiplication Table in User Defined Range

 void Main()
{
    var z = 1;
    var max = 10 ;
    int rangeMax = 10;
    while(z<30)
    {
        table(z,rangeMax);
        z+=1;
    }
}

void table(int val,int MultipleLimits)
{
    int r = 1;
    var result = 0;
    string printstatement = "";
    printstatement = "--------------Table of No "+val.ToString()+"-------------------------";
    printstatement.Dump();
    while (r<=MultipleLimits)
    {
        result = val * r ;
        printstatement = val.ToString()+"x"+r.ToString()+"="+result.ToString();
        printstatement.Dump();
        r+=1;
    }
    printstatement = "---------------------------------------------------------------------";
    printstatement.Dump();
}

// Define other methods and classes here

Output:-

--------------Table of No 1-------------------------
1x1=1
1x2=2
1x3=3
1x4=4
1x5=5
1x6=6
1x7=7
1x8=8
1x9=9
1x10=10
---------------------------------------------------------------------
--------------Table of No 2-------------------------
2x1=2
2x2=4
2x3=6
2x4=8
2x5=10
2x6=12
2x7=14
2x8=16
2x9=18
2x10=20
---------------------------------------------------------------------
--------------Table of No 3-------------------------
3x1=3
3x2=6
3x3=9
3x4=12
3x5=15
3x6=18
3x7=21
3x8=24
3x9=27
3x10=30
---------------------------------------------------------------------
--------------Table of No 4-------------------------
4x1=4
4x2=8
4x3=12
4x4=16
4x5=20
4x6=24
4x7=28
4x8=32
4x9=36
4x10=40
---------------------------------------------------------------------
--------------Table of No 5-------------------------
5x1=5
5x2=10
5x3=15
5x4=20
5x5=25
5x6=30
5x7=35
5x8=40
5x9=45
5x10=50
---------------------------------------------------------------------
--------------Table of No 6-------------------------
6x1=6
6x2=12
6x3=18
6x4=24
6x5=30
6x6=36
6x7=42
6x8=48
6x9=54
6x10=60
---------------------------------------------------------------------
--------------Table of No 7-------------------------
7x1=7
7x2=14
7x3=21
7x4=28
7x5=35
7x6=42
7x7=49
7x8=56
7x9=63
7x10=70
---------------------------------------------------------------------

C# How to Copy Tuple List Values into Integer Array

 void Main()
{
    List<Tuple<int,string>> ab = new List<Tuple<int,string>>();
    ab.Add(Tuple.Create(1,"hello1"));
    ab.Add(Tuple.Create(2,"hello2"));
    ab.Add(Tuple.Create(3,"hello3"));
    ab.Add(Tuple.Create(4,"hello4"));
    ab.Add(Tuple.Create(5,"hello5"));
    ab.Add(Tuple.Create(6,"hello6"));
    ab.Add(Tuple.Create(7,"hello7"));
    //ab.Dump();
    
    string g = "";
    
    int[] x = new int[ab.Count()];    
    int counter = 0;
    foreach(var r in ab)
    {
        if(r.Item1%2==0)
        {
            x[counter] = r.Item1;    
            counter++;
        }
    }
    x.Dump();
    
    var result = ab.Where(p=>x.Contains(p.Item1)).ToList();
    result.Dump();
}

// Define other methods and classes here

Output:-

C# How to Insert Values in Tuple List

 void Main()
{
    List<Tuple<int,string>> ab = new List<Tuple<int,string>>();
    ab.Add(Tuple.Create(1,"hello1"));
    ab.Add(Tuple.Create(2,"hello2"));
    ab.Add(Tuple.Create(3,"hello3"));
    ab.Add(Tuple.Create(4,"hello4"));
    ab.Add(Tuple.Create(5,"hello5"));
    ab.Add(Tuple.Create(6,"hello6"));
    ab.Add(Tuple.Create(7,"hello7"));

}

C# find number in array using foreach loop

 Program.cs

 void Main()
{
    int val = 3;
    int? result = null;
    int[] arr = new int[] {1,2,3,4,5,6,7};
    foreach(int r in arr)
    {
        if(val==r)
        {
            result = int.Parse("0"+r);
            break;
        }
    }
    result.Dump();    
}

output:-

C# how to calculate size / length of array

 void Main()
{
    int[] arr = new int[] {1,2,3,4,5,6,7};
    string ab = arr.Length.ToString();
    ab.Dump();
}

C# How to get Current Date Time from System

 

 void Main()
{
    string ab = Convert.ToString(DateTime.Now);
    ab.Dump();
}