Delete all data from every table in database except table "__EFMigrationsHistory"

DatabaseContextHelper.cs

//this methods aims to be used on a testing database. It's extremely harmful, proceed with caution

public static class DatabaseContextHelper
{
	public static readonly string DisableTablesConstraintsCommand = "EXEC sp_MSForEachTable 'ALTER TABLE ? NOCHECK CONSTRAINT ALL' ";
	public static readonly string DeleteAllTablesDataExceptMigrationsTableCommand = "EXEC sp_MSforeachtable 'if (\"?\" NOT IN (\"[dbo].[__EFMigrationsHistory]\")) DELETE FROM ?'";
	public static readonly string EnableTablesConstraintsCommand = "EXEC sp_MSForEachTable 'ALTER TABLE ? WITH CHECK CHECK CONSTRAINT ALL'";      
	
	public static void DeleteAllDataExceptMigrations(this DbContext context)
	{
		context.Database.ExecuteSqlCommand(ContextExtension.DisableTablesConstraintsCommand);
		context.Database.ExecuteSqlCommand(ContextExtension.DeleteAllTablesDataExceptMigrationsTableCommand);
		context.Database.ExecuteSqlCommand(ContextExtension.EnableTablesConstraintsCommand);
	}
}

//usage:
context.DeleteAllDataExceptMigrations();