Problem on simple operations

get sum of each digit by C# program

Prime Number Program in C#

Program to Check Whether a String is Palindrome or not in C#.

Program to reverse number in C#.

Program to swap two numbers without third variable in C#

Write a program to check armstrong number in C#.

Factorial program in C#

Palindrome number program in C#.

Write a program to Convert Minutes into Seconds in C#.

Write a program to return the Next Number from the Integer Passed in C#.

Program to find the Area of a Triangle in C#

Program to check the Numbers Equal in C#

Program to Convert Hours into Seconds in C#

Program to remove All Special Characters from a String in C#.

Program to Reverse the Order of Words with Five Letters or More in C#

Program to Check for Anagrams in C#

Sum of Prime Numbers in C#.

Program to Convert to Hex in C#

Program to Count the Number of Duplicate Characters in C#

Program to find average Word Length in C#

Program to Sort the String in C#.

Program of Same Letter Patterns in C#.

Program of String Incrementer in C#.

Program to Reverse the String (with a catch) in C#.

Program to Find an Anagram of a String in Another String in C#.

Program to Point Within Triangle in C#.

Maxie & Minnie in C#.

Distance to Nearest Vowel in C#.

Number of Lucky Tickets ("Break a leg challenge"№2) in C#.

Unravel all the Possibilities program in C#.