Hi, 
Deactivate CRM Forms.
Create an XML File and name it as SystemForm
XML FILE:
Pass formname and Objecttypecode in seperation of Comma
<?xml version="1.0" encoding="utf-8" ?>
<systemform>
  <form>account,1</form>
  <form>contact,2</form>
  <form>campaign,4400</form>
  <form>Campaign Activity,4402</form>
  <form>Contract,1010</form>
  <form>Contract Detail,1011</form>
  <form>Email,4202</form>
  <form>Appointment,4201</form>
  <form>Wizard,4201</form>
  <form>Email Server Profile,9605</form>
  <form>Fax,4204</form>
  <form>letter,4207</form>
  <form>Phone Call,4210</form>
  <form>Team,9</form>
  <form>Task,4212</form>
  <form>Sales Literature,1038</form>
  <form>Wizard,4202</form>
  <form>User,8</form>
  </systemform>
C# Code: 
var
appSettings = ConfigurationSettings.AppSettings;
                XmlDocument systemform = new XmlDocument();
                systemform.Load(@"SystemForm.xml");
                int n;
                foreach (XmlNode node in
systemform.DocumentElement.ChildNodes)
                {
                    string[] formnode =
node.InnerText.Split(',');
                    bool isNumeric = int.TryParse(formnode[1],
out n);
                    if (isNumeric)
                    {
                        QueryExpression deactivateForms
= new QueryExpression(appSettings["EntityForms"]);
                       
deactivateForms.ColumnSet = new ColumnSet(true);
                       
deactivateForms.Criteria.AddCondition(new ConditionExpression(appSettings["FormName"],
ConditionOperator.Equal, formnode[0].ToString()));
                       
deactivateForms.Criteria.AddCondition(new ConditionExpression(appSettings["FormAttribute"],
ConditionOperator.Equal, Convert.ToInt32(formnode[1].ToString()))); // Entity
Object type code                
                        EntityCollection
getDeactivatedfroms = orgService.RetrieveMultiple(deactivateForms);
                        foreach (Entity
finaldeactivation in getDeactivatedfroms.Entities)
                        {
                            Entity newentity = new
Entity(appSettings["EntityForms"]);
                           
newentity[appSettings["FormAttribute"]] =
finaldeactivation.Attributes[appSettings["FormAttribute"]];
                            newentity[appSettings["FormActivationState"]]
= new OptionSetValue(Int32.Parse(appSettings["FormInActive"]));
                           
newentity[appSettings["FormId"]] =
finaldeactivation.Attributes[appSettings["FormId"]];
                            orgService.Update(newentity);
                        }
                    }
                    else
                    {
                        MessageBox.Show(formnode[1]
+ "is not Valid For Form Deactivation");
                    }