C # replaces the middle part of the string with the * number

When doing the mall evaluation, in order to show the authenticity of the evaluation and protect the privacy of the customer, we replace the middle part of the user nickname with * (if the word is replaced by * Two string the second string replaced by *) as

Here's how:

1 /// <summary>2 ///returns the hidden middle string3 /// </summary>4 /// <param name= "Input" >input</param>5 /// <returns>Output</returns>6  Public Static stringGetxxxstring (stringInput)7 {8     stringOutput ="";9     Switch(input.length)Ten     { One          Case 1: AOutput ="*"; -              Break; -          Case 2: theOutput = input[0] +"*"; -              Break; -          Case 0: -Output =""; +              Break; -         default: +Output = input.substring (0,1); A              for(inti =0; I < input.length-2; i++) at             { -Output + ="*"; -             } -Output + = input.substring (Input.length-1,1); -              Break; -     } in     returnOutput; -}

C # replaces the middle part of the string with the * number