C#替换CSV文件中每行中的值

using (StreamReader reader = new StreamReader("file.csv"))
{
    string line;
    while ((line = reader.ReadLine()) != null)
    {
        // 处理每一行的数据
    }
}

string[] fields = line.Split(',');

for (int i = 0; i < fields.Length; i++)
{
    if (fields[i] == "oldValue")
    {
        fields[i] = "newValue";
    }
}

using (StreamWriter writer = new StreamWriter("newFile.csv"))
{
    string newLine = string.Join(",", fields);
    writer.WriteLine(newLine);
}