Save the value in sharepoint property bags

Hello,
In this article we will see the sharepoint property bag CRUD operation at different access level( farm level , Web application level , Site Collection level and web level )

Add the property farm level
---------------------------------
SPFarm farmObject = SPFarm.Local;
farmObject .Properties.Add("PropertyKey", "PropertyValue");
farmObject .Update();

Get the property farm level
------------------------------------
SSPFarm farmObject = SPFarm.Local;
if (farmObject.Properties != null && farmObject.Properties.Count > 0)
{
if (farmObject.Properties.ContainsKey("PropertyKey"))
{
String propertyValue = myWebApplication.Properties["PropertyKey"].ToString();
}
}

Change the property farm level
------------------------------------
SPFarm farmObject = SPFarm.Local;
if (farmObject.Properties != null && farmObject.Properties.Count > 0)
{
if (farmObject.Properties.ContainsKey("PropertyKey"))
{
farmObject.Properties["PropertyKey"] = "New Property Value";
        farmObject.Update();
}
}

Remove the property farm level
-------------------------------
SPFarm farmObject = SPFarm.Local;
if (farmObject.Properties != null && farmObject.Properties.Count > 0)
{
if (farmObject.Properties.ContainsKey("PropertyKey"))
{
farmObject.Properties["PropertyKey"] = null;
        farmObject.Properties.Remove("PropertyKey");
        farmObject.Update();
}
}

Add the property web application level
--------------------------------------
SPWebApplication webApplicationObject = SPWebApplication.Lookup(new Uri("http://YourWebApplicationURL"));
webApplicationObject.Properties.Add("PropertyKey", "PropertyValue");
webApplicationObject.Update();

Get the property web application level
--------------------------------------
SPWebApplication webApplicationObject = SPWebApplication.Lookup(new Uri("http://YourWebApplicationURL"));
if (webApplicationObject.Properties != null && webApplicationObject.Properties.Count > 0)
{
if (webApplicationObject.Properties.ContainsKey("PropertyKey"))
{
String propertyValue = webApplicationObject.Properties["PropertyKey"].ToString();
}
}

Change the property web application level
-------------------------------------------
SPWebApplication webApplicationObject = SPWebApplication.Lookup(new Uri("http://YourWebApplicationURL"));
if (webApplicationObject.Properties != null && webApplicationObject.Properties.Count > 0)
{
if (webApplicationObject.Properties.ContainsKey("PropertyKey"))
{
webApplicationObject.Properties["PropertyKey"] = "New Property Value";
webApplicationObject.Update();
}
}

Remove the property web application level
-----------------------------------------
SPWebApplication webApplicationObject = SPWebApplication.Lookup(new Uri("http://YourWebApplicationURL"));
if (webApplicationObject.Properties != null && webApplicationObject.Properties.Count > 0)
{
if (webApplicationObject.Properties.ContainsKey("PropertyKey"))
{
webApplicationObject.Properties["PropertyKey"] = null;
webApplicationObject.Properties.Remove("PropertyKey");          
webApplicationObject.Update();
}
}

Add the property site level
----------------------------
using(SPSite site = new SPSite("http://server:port"))
{
    SPWeb rootWeb = site.RootWeb;  
    rootWeb.Properties.Add("PropertyKey", "PropertyValue");//In sharepoint there is no any provision to store the property value in SPSite object so we can use the RootWeb object
    rootWeb.Properties.Update();          
}

Get the property site level
--------------------------------------
using(SPSite site = new SPSite("http://server:port"))
{
    SPWeb rootWeb = site.RootWeb;  
if (rootWeb.Properties != null && rootWeb.Properties.Count > 0)
{
if (rootWeb.Properties.ContainsKey("PropertyKey"))
{
String propertyValue = rootWeb.Properties["PropertyKey"].ToString();      
}
}
}

Change the property site level
--------------------------------------
using(SPSite site = new SPSite("http://server:port"))
{
    SPWeb rootWeb = site.RootWeb;  
if (rootWeb.Properties != null && rootWeb.Properties.Count > 0)
{
if (rootWeb.Properties.ContainsKey("PropertyKey"))
{
rootWeb.Properties["PropertyKey"] = "New Property Value";
rootWeb.Update();    
}
}
}

Remove the property site level
-----------------------------------------
using(SPSite site = new SPSite("http://server:port"))
{
    SPWeb rootWeb = site.RootWeb;  
if (rootWeb.Properties != null && rootWeb.Properties.Count > 0)
{
if (rootWeb.Properties.ContainsKey("PropertyKey"))
{
rootWeb.Properties["PropertyKey"] = null;
rootWeb.Properties.Remove("PropertyKey");            
rootWeb.Update();    
}
}
}

Add the property web level
----------------------------
using(SPSite site = new SPSite("http://server:port"))
{
    using(SPWeb web = site.OpenWeb())
{  
web.Properties.Add("PropertyKey", "PropertyValue");
web.Properties.Update();          
}
}

Get the property web level
--------------------------------------
using(SPSite site = new SPSite("http://server:port"))
{
    using(SPWeb web = site.OpenWeb())
{
if (web.Properties != null && web.Properties.Count > 0)
{
if (web.Properties.ContainsKey("PropertyKey"))
{
String propertyValue = web.Properties["PropertyKey"].ToString();      
}
}
}
}

Change the property web level
--------------------------------------
using(SPSite site = new SPSite("http://server:port"))
{
    using(SPWeb web = site.OpenWeb())
{
if (web.Properties != null && web.Properties.Count > 0)
{
if (web.Properties.ContainsKey("PropertyKey"))
{
web.Properties["PropertyKey"] = "New Property Value";
web.Update();    
}
}
}
}

Remove the property web level
-----------------------------------------
using(SPSite site = new SPSite("http://server:port"))
{
    using(SPWeb web = site.OpenWeb())
{
if (web.Properties != null && web.Properties.Count > 0)
{
if (web.Properties.ContainsKey("PropertyKey"))
{
web.Properties["PropertyKey"] = null;
web.Properties.Remove("PropertyKey");            
web.Update();    
}
}
}
}

Regards
Hiren Patel