获取字符在c#中相邻出现的次数

string input = "abbcdddeeff";
char target = 'd';
int count = 0;

for (int i = 0; i < input.Length - 1; i++)
{
    if (input[i] == target && input[i] == input[i + 1])
    {
        count++;
    }
}

Console.WriteLine("字符 '{0}' 在字符串中相邻出现的次数为: {1}", target, count);