Write a C# Sharp Program to display the following pattern using the alphabet

Sample Output:

Display the pattern like pyramid using the alphabet:                                                        
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Input the number of Letters (less than 26) in the Pyramid : 8                                               
A                                                                                                         
A B A                                                                                                       
A B C B A                                                                                                   
A B C D C B A                                                                                               
A B C D E D C B A                                                                                           
A B C D E F E D C B A                                                                                       
A B C D E F G F E D C B A                                                                                   
A B C D E F G H G F E D C B A