To resolve the error “The tag does not exist in XML namespace” in WPF application, need to ensure whether the Target framework of an application and Target framework of a referred Syncfusion assemblies are of same version. The detailed as follows:
1. The Target framework of assemblies and Target framework of an application should be same.
For example: If the Target framework is 4.6, then the version for the referred Syncfusion assemblies should be of the same version. The below table shows the version of Syncfusion referred assemblies of an application changes according to the Target framework.
Fig i: The screenshot shows the application targets the 4.6 framework.
2.The referred Syncfusion assemblies of the application should be of same version.
Fig ii: The screenshot shows the Syncfusion assemblies are of same version.
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