SPWorkflow AlterTask didn’t work with hash table which has space into key name

While creating hash table for passing into altertask method, we need to be very careful, because it didn’t like spaces into key name, we need to put our key without spaces.

Sample Code:

taskHash["UserInputField"] = UserInputField.Text;

taskHash["UserInputField_ForHash"] = UserInputField.Text;

taskHash["Status"] = "Completed";

taskHash["Status_ForHash"] = "Completed";

SPWorkflowTask.AlterTask(taskListItem, taskHash, true);

Reference Link:

http://www.databaseforum.info/10/1131769.aspx