Create a project in VS (install sdk arcobjects for .net)
//Connect to geodatabase
// For example, path = @"C:\myData\myfGDB.gdb".
public static IWorkspace FileGdbWorkspaceFromPath(String path)
{
Type factoryType = Type.GetTypeFromProgID("esriDataSourcesGDB.FileGDBWorkspaceFactory");
IWorkspaceFactory workspaceFactory = (IWorkspaceFactory)Activator.CreateInstance(factoryType);
return workspaceFactory.OpenFromFile(path, 0);
}
//open table
IFeatureWorkspace featureWorkspace = (IFeatureWorkspace)workspace;
ITable table= featureWorkspace.OpenTable("YourTable");