Causes
the server cannot meet the requirements of the Expect request-header field.
Fixes
Step 1: Enter Configuration File
Go to your web configuration file to add or modify this line
- System.Net.ServicePointManager.Expect100Continue = false;
Step 2: Modify The Line
Add this line in the configuration file and between <configuration> and </configuration>
<system.net>
<settings>
<servicePointManager expect100Continue = “false” />
</settings>
</system.net>