Difference between String.Equals(string1,string2) and string1.Equals(string2)

Posted by Rajni.Shekhar on 3/16/2012 | Category: C# Interview questions | Views: 6430 | Points: 40

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Answer:

If any of strings value is null, string1.Equals(string2) will throw runtime error but
String.Equals(string1,string2) will not throw any error.

Example:

string str1=null;
string str2="abc";
str2.Equals(str1); // will give runtime error
String.Equals(str1,str2); //will not give any error

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Comments or Responses

Posted by: Naraayanan on: 4/5/2012 | Points: 10

Hi,
Welcome to DNF. you answer is right .But your Example is wrong.Please check this Code .

     try

            {

                string str1 = null;

                string str2 = "abc";

                bool chk;

                chk = str1.Equals(str2); // will give runtime error 

                chk = String.Equals(str1, str2); //will not give any error

            }

            catch (Exception ex)

            {

                MessageBox.Show(ex.Message);

            }

Posted by: Rajni.Shekhar on: 4/6/2012 | Points: 10

Thanks Naraayanan to modify it. :)

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