Hi Bharat,
Thank you for your interest in Syncfusion Essential Studio. You can get the AssemblyInfo.cs file of the Tools.Windows source from the below location.
${install_drive}:\Program Files\Syncfusion\Essential Studio\6.1.0.34\Windows\Tools.Windows\Src\assemblyinfo.cs
Please follow the below steps to build the source using the new private key.
1. Follow the instructions at:
http://msdn2.microsoft.com/en-us/library/6f05ezxy.aspx to create your own private key
2. Copy the snk file created (for example eti.snk) to ${install_drive}:\Program Files\Syncfusion\Essential Studio\6.1.0.34\Windows\Tools.Windows\
3. Change the AssemblyInfo.cs under ${install_drive}:\Program Files\Syncfusion\Essential Studio\6.1.0.34\Windows\Tools.Windows\Src\ to point to this private key instead of the Syncfusion public key that it is pointing to by default:
[assembly: AssemblyDelaySign(true)]
[assembly: AssemblyKeyFile("../../../sf.publicsnk")]
Change above lines to
[assembly: AssemblyDelaySign(false)]
[assembly: AssemblyKeyFile("../../../eti.snk")]
4. Rebuild the Syncfusion.Tools.Windows.dll solution file Syncfusion.Tools.Windows_2005.sln in Release configuration. You will find the output at C:\Program Files\Syncfusion\Essential Studio\6.1.0.34\Windows\Tools.Windows\bin\Release.
5. You need to do this for all the sources of Syncfusion which you are making modifications.
Please try this and let us know if you need further help.
Regards,
Nanda