在C#中比較兩個字符串可以使用以下方法：
string str1 = "Hello";
string str2 = "World";
if (str1.Equals(str2))
{
Console.WriteLine("The strings are equal.");
}
else
{
Console.WriteLine("The strings are not equal.");
}
string str1 = "Hello";
string str2 = "World";
if (str1 == str2)
{
Console.WriteLine("The strings are equal.");
}
else
{
Console.WriteLine("The strings are not equal.");
}
string str1 = "Hello";
string str2 = "World";
int result = string.Compare(str1, str2);
if (result == 0)
{
Console.WriteLine("The strings are equal.");
}
else if (result < 0)
{
Console.WriteLine("str1 is less than str2.");
}
else
{
Console.WriteLine("str1 is greater than str2.");
}
以上是在C#中比較兩個字符串的常見方法，根據具體情況選擇適合的方法進行比較。
