Repeat character without loop in C#

 you can use string constructor that accepts a char and the number of times to repeat it.

Example:

public class Program
{
public static void Main()
{
string tabs = new String('X',  4);
Console.WriteLine(tabs);
}
}

OUTPUT:
XXXX

Right and Left padding in C#

Padding adds the space or any character to the right or left side.

PadRight: This method add the characters in right side and left align
PadLeft: This method add the characters in left side and right align

Readonly and Constant in C#

Constant: Constant fields are define at the time of declaration and once they are defined can't be changed.

NOTE:

1. This can't be declared static.
2. Local scope 
3. This is implicitly static variable.
4. This must to initialised

Readonly: Readonly can be initialised either at the time of declaration or within the constructor of the same class and change the value in the same class constructor.

Dictionary in C#

• Dictionary is generic collection and includes System.Collections.Generic namespace.
• This is collection of Key and value pair and key must be a unique.
• In the dictionary, you cannot be including duplicate key. 
• In the dictionary, duplicate key given run time error.

NOTE:

1. It returns error if we try to find a key which does not exist.
2.  It is faster than a hash table because there is no boxing and unboxing.
3. Dictionary is a generic type which means we can use it with any data type.

List<T> in C#

List

• Lists are strongly typed generic collections.
• They will store values of different or same datatype.
• List size will increase or decrease dynamically.
•  Its defined in the System.Collections.Generic namespace

      Add item in List :