Program problem: There is an array: 122333431333312, remove the duplicated number and get 123431312.

Program problem: There is an array: 122333431333312, remove the duplicated number and get 123431312.

public string Method(string str)

{

StringBuilder stringBuilder = new StringBuilder(str[0].ToString());

char myChar = str[0];

for (int i = 0; i < str.Length; i++)

{

if (myChar != str[i])

{

myChar = str[i];

stringBuilder.Append(str[i]);

}

}

return stringBuilder.ToString();

}